72 087 467 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 2⁷⁵

TF target 2⁷⁴

P-1

B1 =	665000
B2 =	13965000

Status	Date	User	Residue	Shift
Verified	2017-05-15	ANONYMOUS	600CF01E0FFD7202	65144083
Verified	2024-07-10	du	600CF01E0FFD7202	51840776

History

Date	User	Type	Result
2024-07-10	du	C-LL	600CF01E0FFD7202
2017-05-15	ANONYMOUS	C-LL	600CF01E0FFD7202
2016-06-17	-Anonymous-	NF	no factor from 2^74 to 2^75
2014-12-17	apocalypse	NF-PM1	B1=665000, B2=13965000, E=6
2014-08-09	LaurV	NF	no factor from 2^73 to 2^74
2014-08-09	LaurV	NF	no factor from 2^72 to 2^73
2014-08-09	LaurV	NF	no factor from 2^71 to 2^72
2012-12-16	-Anonymous-	NF	no factor from 2^70 to 2^71
2012-10-01	[DPC] hansR	NF	no factor from 2^69 to 2^70
2010-07-14	unconnected	NF	no factor from 2^68 to 2^69
2010-07-11	unconnected	NF	no factor from 2^67 to 2^68
2010-07-09	unconnected	NF	no factor from 2^66 to 2^67
2010-07-06	Bold_Seeker	NF	no factor from 2^65 to 2^66
2010-05-06	xkey	NF	no factor from 2^64 to 2^65
2008-09-19	Wojciech Florek	NF	no factor to 2^64