74 992 277 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 2⁷⁵

TF target 2⁷⁴

P-1

B1 =	655000
B2 =	13100000

Status	Date	User	Residue	Shift	Software
Verified	2015-07-02	afroe	A4A6E13B9A908619	18701303	Windows 64-bit,Prime95,v28.5,build 2
Verified	2025-02-28	Pavel Bogdanov	A4A6E13B9A908619	42981016	Windows 64-bit,Prime95,v30.19,build 20

History

Date	User	Type	Result
2025-02-28	Pavel Bogdanov	C-LL	A4A6E13B9A908619
2015-07-02	afroe	C-LL	A4A6E13B9A908619
2015-03-28	James Heinrich	NF-PM1	B1=655000, B2=13100000, E=12
2015-03-10	NickOfTime	NF	no factor TF: 74-75
2015-03-10	NickOfTime	NF	no factor TF: 73-74
2015-03-10	NickOfTime	NF	no factor TF: 72-73
2011-09-22	Lawrence V. Castiglione III	NF	no factor TF: 1-72
2011-08-29	Lawrence V. Castiglione III	NF	no factor TF: 1-72
2011-01-21	Charles A. Morris	NF	no factor TF: 66-67
2010-09-19	DAMANEE_POGC	NF	no factor TF: 65-66
2010-07-19	Stefano Spagocci	NF	no factor TF: 64-65
2005-02-12	ramgeis	NF	no factor TF: 1-61
2002-05-05	Joss	NF	no factor TF: 1-57