41 299 637 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 2⁷³

TF target 2⁷²

P-1

B1 =	400000
B2 =	2100000

Status	Date	User	Residue	Shift	Software
Bad	2008-03-30	C. Cooper / S. Boone	314F572EBDC9B160	40006480	Windows,Prime95,v24 final,NT service,(aka Wc5)
Verified	2015-08-27	curtisc	47A9F2C7183B7787	16134827	Windows Service,Prime95,v28.5,build 2
Verified	2016-06-20	lkkoller	47A9F2C7183B7787	21823464	Windows 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2024-05-21	James Heinrich	NF	no factor TF: 68-69
2022-05-12	Sid & Andy	NF	no factor TF: 72-73
2016-06-20	lkkoller	C-LL	47A9F2C7183B7787
2015-08-27	curtisc	C-LL	47A9F2C7183B7787
2015-08-18	AirSquirrels	NF	no factor TF: 71-72
2015-01-09	chalsall	NF	no factor TF: 70-71
2014-12-31	chalsall	NF	no factor TF: 69-70
2012-10-26	Carsten Kossendey	NF	no factor TF: 68-69
2008-03-29	curtisc	C-LL	314F572EBDC9B160
2008-03-03	curtisc	NF-PM1	B1=400000, B2=2100000
2007-07-04	monst	NF	no factor TF: 1-68