138 592 477 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 =	685000
B2 =	31584420

Status	Date	User	Residue	Shift	Type	Base
Verified	2025-08-14	Mihai Preda	C687AFC48830C315	0	1	3

History

Date	User	Type	Result
2025-08-14	Fabrice Bellet	CERT	PRP Certification CERT proof power = 10 Proof certified good
2025-08-14	Mihai Preda	C-PRP	C687AFC48830C315 PRP proof power = 10 PRP: Verified Proof certified good
2024-09-21	Ryan Propper	NF-PM1	B1=685000, B2=31584420
2024-07-31	Richard	NF	no factor from 2^76 to 2^77
2024-07-14	SRBase	NF	no factor from 2^75 to 2^76
2017-02-18	PED	NF	no factor from 2^74 to 2^75
2017-02-17	PED	NF	no factor from 2^73 to 2^74
2017-02-17	PED	NF	no factor from 2^72 to 2^73
2017-02-17	PED	NF	no factor from 2^71 to 2^72
2017-02-17	PED	NF	no factor from 2^70 to 2^71
2017-02-05	proxy2222	NF	no factor from 2^69 to 2^70
2016-09-04	TheGazMan	NF	no factor from 2^68 to 2^69
2016-03-02	dbaugh	NF	no factor from 2^67 to 2^68
2015-02-08	sannerud.com	NF	no factor from 2^66 to 2^67
2012-11-19	csaba	NF	no factor from 2^65 to 2^66
2010-12-03	sasaki3	NF	no factor from 2^64 to 2^65
2010-06-12	Torchwood Institute	NF	no factor from 2^63 to 2^64