121 967 581 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 2⁷⁷

P-1

B1 =	915000
B2 =	421623300

Status	Date	User	Residue	Shift	Type	Base
Verified	2024-07-08	montardon	BD94D530158D2249	55740585	1	3

History

Date	User	Type	Result
2024-07-09	William Weaver	CERT	PRP Certification CERT proof power = 8 Proof certified good
2024-07-08	montardon	C-PRP	BD94D530158D2249 PRP proof power = 8 PRP: Verified Proof certified good
2024-03-19	Luke Durant	NF-PM1	B1=915000, B2=421623300
2022-06-26	TheJudger	NF	no factor from 2^76 to 2^77
2021-08-21	TheJudger	NF	no factor from 2^75 to 2^76
2021-08-21	TheJudger	NF	no factor from 2^74 to 2^75
2020-02-03	Niels_Mache_Nextcloud	NF	no factor from 2^73 to 2^74
2020-02-03	Niels_Mache_Nextcloud	NF	no factor from 2^72 to 2^73
2015-07-18	La Güira	NF	no factor from 2^71 to 2^72
2015-07-04	Xebecer	NF	no factor from 2^70 to 2^71
2014-07-22	GrunwalderGIMP	NF	no factor from 2^69 to 2^70
2014-07-22	GrunwalderGIMP	NF	no factor from 2^68 to 2^69
2014-07-22	GrunwalderGIMP	NF	no factor from 2^66 to 2^68
2012-08-21	Richard	NF	no factor from 2^65 to 2^66
2010-10-24	Richard	NF	no factor from 2^64 to 2^65
2010-05-19	Mr-Plonk	NF	no factor from 2^63 to 2^64