66 351 487 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁶

TF target 2⁷⁴

P-1

B1 =	640000
B2 =	13600000

Status	Date	User	Residue	Shift	Software
Verified	2015-03-15	Kyle Z Schmidt	1E9EAF96AD381E56	20991189	Windows 64-bit,Prime95,v28.5,build 2
Verified	2023-02-22	Ryan Propper	1E9EAF96AD381E56	21497584	Linux 64-bit,Prime95,v30.7,build 9

History

Date	User	Type	Result
2023-02-22	Ryan Propper	C-LL	1E9EAF96AD381E56
2020-01-11	Sid & Andy	NF	no factor TF: 75-76
2019-09-01	Sid & Andy	NF	no factor TF: 74-75
2015-03-15	Kyle Z Schmidt	C-LL	1E9EAF96AD381E56
2014-05-04	TheJudger	NF	no factor TF: 73-74
2014-04-27	TheJudger	NF-PM1	B1=640000, B2=13600000, E=12
2014-04-14	brilong	NF	no factor TF: 72-73
2014-04-14	brilong	NF	no factor TF: 71-72
2012-07-13	Marzbug	NF	no factor TF: 70-71
2012-04-19	Gymnasium_Raubling	NF	no factor TF: 69-70
2009-12-12	GrunwalderGIMP	NF	no factor TF: 68-69
2009-12-11	-anonymous-	NF	no factor TF: 67-68
2009-12-06	Rendon	NF	no factor TF: 66-67
2009-12-06	Ungelovende	NF	no factor TF: 65-66
2009-11-28	Ungelovende	NF	no factor TF: 64-65
2009-03-02	1997rj7	NF	no factor TF: 1-64