61 515 019 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

TF

No factors below 2⁷⁴

TF target 2⁷⁴

P-1

B1 =	685000
B2 =	685000

Status	Date	User	Residue	Shift
Unverified	2013-07-21	Arthur Rosenthal	C28FAE9B6B81EE__	9572355

Status	Date	User	Residue	Shift	Type	Base
Verified	2021-09-12	adamgm	300C56A675221761	0	1	3
Verified	2021-09-19	_p95holder_	300C56A675221761	12141702	1	3

History

Date	User	Type	Result
2021-09-19	_p95holder_	C-PRP	300C56A675221761 PRP: Verified PRP without proof (not generated)
2021-09-12	adamgm	C-PRP	300C56A675221761 PRP: Verified PRP without proof (not generated)
2016-03-04	-Anonymous-	NF	no factor from 2^73 to 2^74
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2013-07-21	Arthur Rosenthal	C-LL	C28FAE9B6B81EE__
2013-02-12	-Anonymous-	NF-PM1	B1=685000
2013-02-02	RichD0	NF	no factor from 2^71 to 2^73
2012-09-06	Clown_Royal	NF	no factor from 2^70 to 2^71
2011-11-11	Zero0920	NF	no factor from 2^69 to 2^70
2009-10-17	tromc	NF	no factor from 2^68 to 2^69
2009-10-13	tromc	NF	no factor from 2^67 to 2^68
2009-10-11	arnaud	NF	no factor from 2^66 to 2^67
2009-09-29	kutens	NF	no factor from 2^65 to 2^66
2009-07-27	Pi_Rho	NF	no factor from 2^64 to 2^65
2009-04-10	cnaTb_xo4y	NF	no factor from 2^63 to 2^64