5 711 257 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

TF

No factors below 2⁷²

TF target 2⁶⁶

P-1

B1 =	3400000
B2 =	7455174090

ECM

Digits	B1	Curves
25	50000	90 / 280

Estimated T-Level: 21.6 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-09-06	Joel Armengaud	AD454B1B047E0270	0
Verified	2000-12-21	Walt Cooney	AD454B1B047E0270	3863894

History

Date	User	Type	Result
2022-10-03	Sid & Andy	NF-PM1	B1=3400000, B2=7455174090
2020-12-18	-Anonymous-	NF	no factor from 2^71 to 2^72
2020-12-17	-Anonymous-	NF	no factor from 2^70 to 2^71
2020-12-14	-Anonymous-	NF	no factor from 2^69 to 2^70
2020-08-11	TJAOI	NF	no factor from 2^68 to 2^69
2019-11-20	USAFSS	NF-PM1	B1=345000, B2=10263750, E=12
2018-07-05	ramgeis	NF	no factor from 2^67 to 2^68
2016-06-27	Gordon Spence	NF	no factor from 2^66 to 2^67
2015-09-05	snme2pm1	NF	no factor from 2^65 to 2^66
2014-10-29	lycorn	NF	no factor from 2^64 to 2^65
2014-10-16	Nesowa	NF	no factor from 2^63 to 2^64
2011-03-23	USAFSS	NF-PM1	B1=65000, B2=1088750, E=6
2009-04-05	GrunwalderGIMP	NF	no factor from 2^62 to 2^63