31 537 591 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 2⁷¹

P-1

B1 =	370000
B2 =	6937500

Status	Date	User	Residue	Shift	Software
Verified	2009-03-20	Stephen White	01E3734D7AFFAA50	17408410	Linux 32-bit,Prime95,v24 final,(aka Wc2)
Verified	2013-12-18	Dubslow	01E3734D7AFFAA50	30313282	Linux 64-bit,Prime95,v27.9,build 1

History

Date	User	Type	Result
2021-04-22	-anonymous-	NF	no factor TF: 75-76
2021-04-19	-anonymous-	NF	no factor TF: 74-75
2020-03-23	-anonymous-	NF	no factor TF: 73-74
2019-11-29	-anonymous-	NF	no factor TF: 71-72
2019-11-29	-anonymous-	NF	no factor TF: 72-73
2018-11-19	ramgeis	NF	no factor TF: 70-71
2013-12-18	Dubslow	C-LL	01E3734D7AFFAA50
2013-03-15	bcp19	NF	no factor TF: 69-70
2012-06-30	megavink	NF	no factor TF: 68-69
2011-05-29	Ungelovende	NF	no factor TF: 67-68
2009-03-20	Stephen White	C-LL	01E3734D7AFFAA50
2007-09-13	-anonymous-	NF-PM1	B1=370000, B2=6937500
2005-12-24	Team_Bundu	NF	no factor TF: 1-67
2004-11-22	-anonymous-	NF	no factor TF: 1-61
2003-08-31	-anonymous-	NF	no factor TF: 1-59
2003-08-25	-anonymous-	NF	no factor TF: 1-59
2001-08-31	Net_Force	NF	no factor TF: 1-56
2001-01-14	Joss	NF	no factor TF: 1-52