141 181 903 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 =	814000
B2 =	71270940

Status	Date	User	Residue	Shift	Type	Base
Verified	2025-07-16	GrahamW	9748E1A94AC67911	46585544	1	3

History

Date	User	Type	Result
2025-07-17	Alexander Sortov	CERT	PRP Certification CERT proof power = 8 Proof certified good
2025-07-16	GrahamW	C-PRP	9748E1A94AC67911 PRP proof power = 8 PRP: Verified Proof certified good
2024-09-30	R Giltrap	NF-PM1	B1=814000, B2=71270940
2024-09-02	Luke Durant	NF	no factor from 2^76 to 2^77
2024-07-16	SRBase	NF	no factor from 2^75 to 2^76
2023-01-19	SRBase	NF	no factor from 2^74 to 2^75
2021-11-08	SRBase	NF	no factor from 2^73 to 2^74
2020-10-25	SRBase	NF	no factor from 2^72 to 2^73
2017-02-21	workerthread	NF	no factor from 2^71 to 2^72
2017-02-14	workerthread	NF	no factor from 2^70 to 2^71
2017-02-08	JoDu	NF	no factor from 2^69 to 2^70
2016-03-23	Smok_bmv	NF	no factor from 2^68 to 2^69
2016-03-10	dbaugh	NF	no factor from 2^67 to 2^68
2015-02-18	KayJongsma	NF	no factor from 2^66 to 2^67
2012-12-03	Vermiculus	NF	no factor from 2^65 to 2^66
2010-12-13	sasaki3	NF	no factor from 2^64 to 2^65
2010-06-15	xiaowuc1	NF	no factor from 2^63 to 2^64