61 298 513 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 2⁷⁴

TF target 2⁷⁴

P-1

B1 =	540000
B2 =	10530000

Status	Date	User	Residue	Shift	Software
Verified	2014-05-26	Kyle Z Schmidt	169C2816BEA336C4	50500774	Windows 64-bit,Prime95,v27.9,build 1
Verified	2021-08-22	BlackPixel83	169C2816BEA336C4	19864189	Windows 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2021-08-22	BlackPixel83	C-LL	169C2816BEA336C4
2016-02-23	Mark Rose	NF	no factor TF: 62-63
2014-05-26	Kyle Z Schmidt	C-LL	169C2816BEA336C4
2013-06-16	BigBrother	NF-PM1	B1=540000, B2=10530000, E=6
2013-06-14	Chuck	NF	no factor TF: 73-74
2013-01-23	Jerry Hallett	NF	no factor TF: 72-73
2011-11-11	phoenicis	NF	no factor TF: 71-72
2011-11-11	phoenicis	NF	no factor TF: 70-71
2011-11-11	phoenicis	NF	no factor TF: 69-70
2009-12-02	Sturle Sunde	NF	no factor TF: 68-69
2009-11-30	riccardo.brasca	NF	no factor TF: 67-68
2009-04-17	Team_Deutschland	NF	no factor TF: 66-67
2009-04-08	-anonymous-	NF	no factor TF: 65-66
2009-04-06	-anonymous-	NF	no factor TF: 64-65
2009-04-05	-anonymous-	NF	no factor TF: 63-64
2004-04-09	-anonymous-	NF	no factor TF: 1-62
2003-10-23	Gordon Spence	NF	no factor TF: 1-60
2003-06-17	Gordon Spence	NF	no factor TF: 1-59