Date  Miscellaneous milestones 
20180408  All tests below M(43 112 609) are verified, officially making it the 47th Mersenne prime. 
20180222  All tests below M(42 643 801) are verified, officially making it the 46th Mersenne prime. 
20160902  All tests below M(37 156 667) are verified, officially making it the 45th Mersenne prime. 
20150203  All exponents below 33 219 253 (10 million digits) verified. 
20141108  All tests below M(32 582 657) are verified, officially making it the 44th Mersenne prime. 
20140809  First 100 million digit number independently verified  M(345 678 877). 
20140223  All tests below M(30 402 457) are verified, officially making it the 43rd Mersenne prime. 
20130308  First 100 million digit number successfully verified  M(383 838 383). 
20121220  All tests below M(25 964 951) are verified, officially making it the 42nd Mersenne prime. 
20120627  First 100 million digit number tested for primality without detected errors  M(332 194 529). 
20111201  All tests below M(24 036 583) are verified, officially making it the 41st Mersenne prime. 
20100711  All tests below M(20 996 011) are verified, officially making it the 40th Mersenne prime. 
20060710  All tests below M(13 466 917) are verified, officially making it the 39th Mersenne prime. 
20030202  All tests below M(6 972 593) are verified, officially making it the 38th Mersenne prime. 
20010406  First 10 million digit number sucessfully verified. 
20000925  First 10 million digit number tested for primality. 
20000519  All tests below M(2 976 221) and M(3 021 377) are verified, officially making them the 36th and 37th Mersenne primes. 
19981226  All Mersenne numbers less than a million digits tested at least once. 
19981218  All tests below M(1 398 269) are verified, officially making it the 35th Mersenne prime. 
19980329  All tests below M(1 257 787) are verified, officially making it the 34th Mersenne prime. 
19970830  All tests below M(756 839) and M(859 433) are verified, officially making them the 32nd and 33rd Mersenne primes. 
1996Third Quarter  All tests below M(216 091) are verified, officially making it the 31st Mersenne prime. 

Date  Mersenne Prime milestones 
20180302  All exponents below M(77 232 917) tested at least once. 
20171005  All exponents below M(74 207 281) tested at least once. 
20151004  All exponents below M(57 885 161) tested at least once. 
20120905  All exponents below M(43 112 609) tested at least once. 
20120905  All exponents below M(42 643 801) tested at least once. 
20101225  All exponents below M(37 156 667) tested at least once. 
20101225  All exponents below M(32 582 657) tested at least once. 
20100729  All exponents below M(30 402 457) tested at least once. 
20090408  All exponents below M(25 964 951) tested at least once. 
20090223  All exponents below M(24 036 583) tested at least once. 
20080704  All exponents below M(20 996 011) tested at least once. 
20041003  All exponents below M(13 466 917) tested at least once. 
20010725  All exponents below M(6 972 593) tested at least once. 
19980926  All exponents below M(3 021 377) tested at least once. 
19980919  All exponents below M(2 976 221) tested at least once. 
19971011  All exponents below M(1 398 269) tested at least once. 
19970828  All exponents below M(1 257 787) tested at least once. 
19970328  All exponents below M(859 433) tested at least once. 
19970115  All exponents below M(756 839) tested at least once. 

Date  First time checks 
20181021  All exponents below 81 million tested at least once. 
20180816  All exponents below 80 million tested at least once. 
20180620  All exponents below 79 million tested at least once. 
20180418  All exponents below 78 million tested at least once. 
20180227  All exponents below 77 million tested at least once. 
20171214  All exponents below 76 million tested at least once. 
20171005  All exponents below 75 million tested at least once. 
20170919  All exponents below 74 million tested at least once. 
20170806  All exponents below 73 million tested at least once. 
20170708  All exponents below 72 million tested at least once. 
20170320  All exponents below 71 million tested at least once. 
20161229  All exponents below 70 million tested at least once. 
20161119  All exponents below 69 million tested at least once. 
20160906  All exponents below 68 million tested at least once. 
20160525  All exponents below 67 million tested at least once. 
20160511  All exponents below 66 million tested at least once. 
20160511  All exponents below 65 million tested at least once. 
20160511  All exponents below 64 million tested at least once. 
20160219  All exponents below 63 million tested at least once. 
20160217  All exponents below 62 million tested at least once. 
20160217  All exponents below 61 million tested at least once. 
20151226  All exponents below 60 million tested at least once. 
20151222  All exponents below 59 million tested at least once. 
20151004  All exponents below 58 million tested at least once. 
20150809  All exponents below 57 million tested at least once. 
20150809  All exponents below 56 million tested at least once. 
20150606  All exponents below 55 million tested at least once. 
20150105  All exponents below 54 million tested at least once. 
20141119  All exponents below 53 million tested at least once. 
20141119  All exponents below 52 million tested at least once. 
20140501  All exponents below 51 million tested at least once. 
20140408  All exponents below 50 million tested at least once. 
20140406  All exponents below 49 million tested at least once. 
20140326  All exponents below 48 million tested at least once. 
20140317  All exponents below 47 million tested at least once. 
20140313  All exponents below 46 million tested at least once. 
20131211  All exponents below 45 million tested at least once. 
20121109  All exponents below 44 million tested at least once. 
20120905  All exponents below 43 million tested at least once. 
20120905  All exponents below 42 million tested at least once. 
20120805  All exponents below 41 million tested at least once. 
20120802  All exponents below 40 million tested at least once. 
20120722  All exponents below 39 million tested at least once. 
20110719  All exponents below 38 million tested at least once. 
20101225  All exponents below 37 million tested at least once. 
20101225  All exponents below 36 million tested at least once. 
20101225  All exponents below 35 million tested at least once. 
20101225  All exponents below 34 million tested at least once. 
20101225  All exponents below 33 million tested at least once. 
20101225  All exponents below 32 million tested at least once. 
20100806  All exponents below 31 million tested at least once. 
20100729  All exponents below 30 million tested at least once. 
20100714  All exponents below 29 million tested at least once. 
20100210  All exponents below 28 million tested at least once. 
20090818  All exponents below 27 million tested at least once. 
20090408  All exponents below 26 million tested at least once. 
20090225  All exponents below 25 million tested at least once. 
20090223  All exponents below 24 million tested at least once. 
20081222*  All exponents below 23 million tested at least once. 
20081025*  All exponents below 22 million tested at least once. 
20080819*  All exponents below 21 million tested at least once. 
20071231  All exponents below 20 million tested at least once. 
20071117*  All exponents below 19 million tested at least once. 
20061024  All exponents below 18 million tested at least once. 
20060301  All exponents below 17 million tested at least once. 
20051224  All exponents below 16 million tested at least once. 
20050223  All exponents below 15 million tested at least once. 
20050212*  All exponents below 14 million tested at least once. 
20041003*  All exponents below 13 million tested at least once. 
20040309  All exponents below 12 million tested at least once. 
20040118*  All exponents below 11 million tested at least once. 
20020719  All exponents below 10 million tested at least once. 
20020415  All exponents below 9 million tested at least once. 
20010925  All exponents below 8 million tested at least once. 
20010925*  All exponents below 7 million tested at least once. 
20010401  All exponents below 6 million tested at least once. 
20000315  All exponents below 5 million tested at least once. 
19990819  All exponents below 4 million tested at least once. 
19980926*  All exponents below 3 million tested at least once. 
19980305  All exponents below 2 million tested at least once. 
19970526  All exponents below 1 million tested at least once. 
* = estimated  

Date  Verification Milestones 
20180909  All tests below 45 million verified. 
20180613  All tests below 44 million verified. 
20180408  All tests below 43 million verified. 
20171231  All tests below 42 million verified. 
20170905  All tests below 41 million verified. 
20170527  All tests below 40 million verified. 
20170304  All tests below 39 million verified. 
20161101  All tests below 38 million verified. 
20160902  All tests below 37 million verified. 
20160601  All tests below 36 million verified. 
20160129  All tests below 35 million verified. 
20150519  All tests below 34 million verified. 
20141221  All tests below 33 million verified. 
20141108  All tests below 32 million verified. 
20141001  All tests below 31 million verified. 
20140214  All tests below 30 million verified. 
20140204  All tests below 29 million verified. 
20140111  All tests below 28 million verified. 
20140109  All tests below 27 million verified. 
20121220  All tests below 26 million verified. 
20120827  All tests below 25 million verified. 
20111201  All tests below 24 million verified. 
20111201  All tests below 23 million verified. 
20110423  All tests below 22 million verified. 
20100711  All tests below 21 million verified. 
20100107  All tests below 20 million verified. 
20091030  All tests below 19 million verified. 
20090223  All tests below 18 million verified. 
20080708  All tests below 17 million verified. 
20071203  All tests below 16 million verified. 
20070423  All tests below 15 million verified. 
20060911  All tests below 14 million verified. 
20060613  All tests below 13 million verified. 
20060613  All tests below 12 million verified. 
20051212*  All tests below 11 million verified. 
20050426  All tests below 10 million verified. 
20040917  All tests below 9 million verified. 
20040223  All tests below 8 million verified. 
20030227*  All tests below 7 million verified. 
20021216  All tests below 6 million verified. 
20020502  All tests below 5 million verified. 
20010520  All tests below 4 million verified. 
20000519*  All tests below 3 million verified. 
19991016  All tests below 2 million verified. 
19971030  All tests below 1 million verified. 
* = estimated  