91 256 299 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 PRP test

TF

No factors below 2⁷⁷

TF target 2⁷⁵

P-1

B1 =	695000
B2 =	12162500

Status	Date	User	Residue	Shift	Type	Base
Verified	2019-05-25	ky0uraku	530AC1D21D37D3C2	89304013	1	3
Verified	2025-02-19	GdS	530AC1D21D37D3C2	0	1	3

History

Date	User	Type	Result
2025-02-20	Pappy	CERT	PRP Certification CERT proof power = 10 Proof certified good
2025-02-19	GdS	C-PRP	530AC1D21D37D3C2 PRP proof power = 10 PRP: Verified Proof certified good
2019-05-25	ky0uraku	C-PRP	530AC1D21D37D3C2 PRP: Verified PRP without proof (not generated)
2019-04-22	Skind_DK	NF-PM1	B1=695000, B2=12162500
2019-03-03	TheJudger	NF	no factor from 2^76 to 2^77
2018-12-16	TheJudger	NF	no factor from 2^75 to 2^76
2018-12-16	TheJudger	NF	no factor from 2^74 to 2^75
2018-03-03	gcardona	NF	no factor from 2^73 to 2^74
2018-02-28	1997rj7	NF	no factor from 2^72 to 2^73
2017-03-03	monst	NF	no factor from 2^71 to 2^72
2014-09-14	Meral Harbes	NF	no factor from 2^70 to 2^71
2014-02-13	dufrenbk	NF	no factor from 2^69 to 2^70
2014-02-10	g0b	NF	no factor from 2^68 to 2^69
2014-02-07	Cornelius Caesar	NF	no factor from 2^67 to 2^68
2014-02-03	Cornelius Caesar	NF	no factor from 2^66 to 2^67
2013-06-10	David Campeau	NF	no factor from 2^65 to 2^66
2010-12-29	Architects Cubed	NF	no factor from 2^64 to 2^65