155 461 109 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 2⁷⁸

P-1

B1 =	1389000
B2 =	1681922550

Status	Date	User	Residue	Shift	Type	Base
Verified	2024-08-22	Will K	C78E74C954B7038C	0	1	3

History

Date	User	Type	Result
2025-09-14	Architects Cubed	NF	no factor from 2^76 to 2^77
2024-08-22	chevron	CERT	PRP Certification CERT proof power = 10 Proof certified good
2024-08-22	Will K	C-PRP	C78E74C954B7038C PRP proof power = 10 PRP: Verified Proof certified good
2024-08-15	SRBase	NF	no factor from 2^75 to 2^76
2024-07-24	Luke Durant	NF-PM1	B1=1389000, B2=1681922550
2023-02-18	SRBase	NF	no factor from 2^74 to 2^75
2021-11-15	SRBase	NF	no factor from 2^73 to 2^74
2018-03-21	hkt	NF	no factor from 2^72 to 2^73
2018-03-21	hkt	NF	no factor from 2^71 to 2^72
2018-01-13	proxy2222	NF	no factor from 2^70 to 2^71
2017-08-19	La Güira	NF	no factor from 2^69 to 2^70
2016-07-11	Derek	NF	no factor from 2^68 to 2^69
2016-05-03	ANONYMOUS	NF	no factor from 2^67 to 2^68
2015-04-11	vwflat4	NF	no factor from 2^66 to 2^67
2013-02-03	fireredd	NF	no factor from 2^65 to 2^66
2011-01-23	dsl	NF	no factor from 2^64 to 2^65