138 923 237 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 =	672000
B2 =	31711470

Status	Date	User	Residue	Shift	Type	Base
Verified	2025-10-07	Mihai Preda	2E68A2539FD8DAA0	0	1	3

History

Date	User	Type	Result
2025-10-07	valmarmoritz	CERT	PRP Certification CERT proof power = 10 Proof certified good
2025-10-07	Mihai Preda	C-PRP	2E68A2539FD8DAA0 PRP proof power = 10 PRP: Verified Proof certified good
2024-09-22	Ryan Propper	NF-PM1	B1=672000, B2=31711470
2024-08-07	Luke Durant	NF	no factor from 2^76 to 2^77
2024-07-13	SRBase	NF	no factor from 2^75 to 2^76
2023-01-15	SRBase	NF	no factor from 2^74 to 2^75
2021-08-02	SRBase	NF	no factor from 2^73 to 2^74
2016-03-22	Brian V.	NF	no factor from 2^72 to 2^73
2016-03-22	Brian V.	NF	no factor from 2^71 to 2^72
2016-03-22	Brian V.	NF	no factor from 2^70 to 2^71
2016-03-19	La Güira	NF	no factor from 2^69 to 2^70
2016-03-19	La Güira	NF	no factor from 2^68 to 2^69
2016-03-02	dbaugh	NF	no factor from 2^67 to 2^68
2015-02-02	el grocco	NF	no factor from 2^66 to 2^67
2012-11-20	nextPrime	NF	no factor from 2^65 to 2^66
2010-12-04	Mr-Plonk	NF	no factor from 2^64 to 2^65
2010-06-12	oodaira	NF	no factor from 2^63 to 2^64