138 440 227 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with PRP test

No factors below 2⁷⁷

TF target 2⁷⁷

P-1

B1 =	1167000
B2 =	1207602990

Status	Proof	Date	User	Residue	Shift	Type	Base
Verified	Certified Good Power=8	2025-10-12	joe b.	651D4361463F89D8	35959668	1	3
Verified	Certified Good Power=8	2025-10-21	tuxrunner	651D4361463F89D8	25738230	1	3

History

Date	User	Type	Result
2025-10-21	cmdrscampers	CERT	Proof certified good
2025-10-21	tuxrunner	C-PRP	Proof Certified Good Proof Power: 8
2025-10-12	Fabrice Bellet	CERT	Proof certified good
2025-10-12	joe b.	C-PRP	Proof Certified Good Proof Power: 8
2024-09-20	Luke Durant	NF-PM1	B1=1167000, B2=1207602990
2024-07-28	Richard	NF	no factor TF: 76-77
2024-07-16	SRBase	NF	no factor TF: 75-76
2023-01-13	SRBase	NF	no factor TF: 74-75
2021-08-02	SRBase	NF	no factor TF: 73-74
2020-10-27	SRBase	NF	no factor TF: 72-73
2016-09-15	Earle Lowe	NF	no factor TF: 71-72
2016-09-15	Earle Lowe	NF	no factor TF: 70-71
2016-09-11	La Güira	NF	no factor TF: 69-70
2016-09-11	La Güira	NF	no factor TF: 68-69
2016-08-02	proxy2222	NF	no factor TF: 67-68
2015-02-07	vwflat4	NF	no factor TF: 66-67
2012-11-17	sasaki3	NF	no factor TF: 65-66
2010-12-04	Richard	NF	no factor TF: 64-65
2010-06-12	Kevin Jaget	NF	no factor TF: 63-64