41 940 097 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 both PRP and Lucas-Lehmer tests

No factors below 2⁷⁵

TF target 2⁷²

P-1

B1 =	375000
B2 =	7218750

Status	Date	User	Residue	Shift	Software
Bad	2008-11-08	Stephen Wood	8F92307873FD1FD6	6735644	Linux 32-bit,Prime95,v25.7,build 3
Bad	2009-08-27	ANONYMOUS	A42792C897253354	23630998	Windows,Prime95,v24 final,NT service,(aka Wc5)
Bad	2009-10-21	-anonymous-	2F6753E0F1B58727	39798651	Windows,Prime95,v24 final,(aka Wc1)
Bad	2009-12-24	-anonymous-	F63502E8F500547B	27146124	Windows,Prime95,v24 final,(aka Wc1)
Verified	2010-09-28	-anonymous-	C6E3098CDE7A2547	23610176	Windows Service,Prime95,v25.11,build 2
Verified	2011-04-27	Torchwood Institute	C6E3098CDE7A2547	32216625	Windows 64-bit,Prime95,v26.3,build 3

Status	Proof	Date	User	Residue	Shift	Type	Base
Verified	Certified Good Power=9	2024-12-27	kkmrkkblmbrbk	1B250ACCDD574B74	4243275	1	3

History

Date	User	Type	Result
2024-12-27	curtisc	CERT	Proof certified good
2024-12-27	kkmrkkblmbrbk	C-PRP	Proof Certified Good Proof Power: 9
2019-08-03	James Heinrich	NF-PM1	B1=375000, B2=7218750, E=12
2015-03-22	VictordeHollander	NF	no factor TF: 74-75
2015-03-20	VictordeHollander	NF	no factor TF: 73-74
2015-03-20	VictordeHollander	NF	no factor TF: 72-73
2015-03-20	VictordeHollander	NF	no factor TF: 71-72
2015-03-20	VictordeHollander	NF	no factor TF: 70-71
2014-12-17	monst	NF	no factor TF: 69-70
2011-04-27	Torchwood Institute	C-LL	C6E3098CDE7A2547
2010-09-28	-anonymous-	C-LL	C6E3098CDE7A2547
2009-12-24	-anonymous-	C-LL	F63502E8F500547B
2009-10-21	-anonymous-	C-LL	2F6753E0F1B58727
2009-08-27	ANONYMOUS	C-LL	A42792C897253354
2008-11-08	Stephen Wood	C-LL	8F92307873FD1FD6
2008-08-07	Stephen Wood	NF	no factor TF: 1-69
2008-02-03	Brian W	NF-PM1	B1=690000
2007-07-04	cmarble	NF	no factor TF: 1-68