140 215 489 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 =	1199000
B2 =	1376542530

Status	Date	User	Residue	Shift	Type	Base
Verified	2025-05-13	curtisc	FE1C60CBF4E145C6	138664491	1	3

History

Date	User	Type	Result
2025-05-13	Marvinist	CERT	PRP Certification CERT proof power = 8 Proof certified good
2025-05-13	curtisc	C-PRP	FE1C60CBF4E145C6 PRP proof power = 8 PRP: Verified Proof certified good
2024-09-25	Luke Durant	NF-PM1	B1=1199000, B2=1376542530
2024-08-29	bayanne	NF	no factor from 2^76 to 2^77
2023-10-19	tsc	NF	no factor from 2^75 to 2^76
2023-01-18	SRBase	NF	no factor from 2^74 to 2^75
2021-11-02	SRBase	NF	no factor from 2^73 to 2^74
2020-11-12	SRBase	NF	no factor from 2^72 to 2^73
2017-02-19	guru	NF	no factor from 2^71 to 2^72
2017-02-18	JoDu	NF	no factor from 2^70 to 2^71
2015-05-06	Judge Hale	NF	no factor from 2^69 to 2^70
2015-05-06	Judge Hale	NF	no factor from 2^68 to 2^69
2015-05-06	Judge Hale	NF	no factor from 2^67 to 2^68
2015-02-13	Karol T	NF	no factor from 2^66 to 2^67
2012-11-27	sasaki3	NF	no factor from 2^65 to 2^66
2010-12-10	Richard	NF	no factor from 2^64 to 2^65
2010-06-14	Torchwood Institute	NF	no factor from 2^63 to 2^64