62 891 251 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 =	560000
B2 =	11200000

Status	Date	User	Residue	Shift	Software
Bad	2014-04-24	Helmut Kirrmaier	0000000000000000	0	Glucas with shift counts,(aka G29)
Verified	2014-11-26	MadPoo 🙂	8F12D5DB3E8A0722	2110941	Windows 64-bit,Prime95,v26,(aka We4)
Verified	2016-02-06	Mark Rose	8F12D5DB3E8A0722	31906638	Linux 64-bit,Prime95,v28.6,build 1

History

Date	User	Type	Result
2016-02-23	Mark Rose	NF	no factor TF: 59-63
2016-02-06	Mark Rose	C-LL	8F12D5DB3E8A0722
2014-11-26	MadPoo 🙂	C-LL	8F12D5DB3E8A0722
2014-04-24	Helmut Kirrmaier	C-LL	0000000000000000
2013-08-25	owftheevil	NF-PM1	B1=560000, B2=11200000, E=12
2013-08-16	TheJudger	NF	no factor TF: 73-74
2013-04-02	bcp19	NF	no factor TF: 72-73
2013-04-02	bcp19	NF	no factor TF: 71-72
2012-09-07	Bold_Seeker	NF	no factor TF: 70-71
2011-12-13	Gnorfe	NF	no factor TF: 69-70
2010-01-02	Ungelovende	NF	no factor TF: 68-69
2009-12-30	Ungelovende	NF	no factor TF: 67-68
2009-12-27	Ungelovende	NF	no factor TF: 66-67
2009-12-24	Ungelovende	NF	no factor TF: 65-66
2009-08-17	kvizbar	NF	no factor TF: 64-65
2009-02-03	Wojciech Florek	NF	no factor TF: 63-64
2003-07-13	Gordon Spence	NF	no factor TF: 1-59