7 852 241 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 2 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁶⁷

Factored

Factor	Digits	Bits	Date
12636032572020488377	20	63.5	2012-09-05 08:37:04
20803311806894291761	20	64.2	2012-09-05 08:37:04

P-1 factors

Date	Factors	B1	B2
2012-09-05	12636032572020488377 20803311806894291761	1000000	0

Status	Date	User	Residue	Shift	Software
Factored	1999-09-22	Ivan Tsatsarov	B6D73DBFD4DCB8DB	1501021	Windows,Prime95,v18,(aka WU1)
Factored	2002-05-18	Marc Getty / Phil Fizur	B6D73DBFD4DCB8DB	365029	Windows,Prime95,v21,NT service,(aka WX5)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2018-03-29	kkmrkkblmbrbk	8A1132B2BADB1E2F	2	3185197	5	3
Verified	PRP without proof (not generated)	2019-10-25	ATH	8A1132B2BADB1E2F	2	7674674	5	3

History

Date	User	Type	Result
2025-01-02	Stef42	NF-PM1	B1=1101000, B2=1379991690
2019-10-25	ATH	C-PRP	M7852241/12636032572020488377/20803311806894291761 : 8A1132B2BADB1E2F
2018-03-29	kkmrkkblmbrbk	C-PRP	M7852241/12636032572020488377/20803311806894291761 : 8A1132B2BADB1E2F
2012-09-05	nextPrime	F	Factor: 262871325597814670948015440740747361897
2002-05-18	-anonymous-	C-LL	B6D73DBFD4DCB8DB
2002-05-11	-anonymous-	NF-PM1	B1=40000, B2=510000
1999-09-22	-anonymous-	C-LL	B6D73DBFD4DCB8DB
1998-11-21	-anonymous-	NF	no factor TF: 1-63
1998-09-06	-anonymous-	NF	no factor TF: 1-62
1998-08-09	-anonymous-	NF	no factor TF: 1-61