50 689 487 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 Lucas-Lehmer test

No factors below 2⁷⁴

TF target 2⁷³

P-1

B1 =	590000
B2 =	15782500

Status	Date	User	Residue	Shift	Software
Verified	2012-03-12	Tom Dickens	B8CFC83EFE681AAF	34896003	Windows,Prime95,v26.6,build 3
Verified	2020-04-30	Dubslow	B8CFC83EFE681AAF	46397088	Linux 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2020-04-30	Dubslow	C-LL	B8CFC83EFE681AAF
2019-06-02	TheJudger	NF	no factor TF: 73-74
2015-12-04	Judge Hale	NF	no factor TF: 72-73
2012-03-12	Tom Dickens	C-LL	B8CFC83EFE681AAF
2012-02-03	Craig Meyers	NF	no factor TF: 70-72
2011-12-10	David Campeau	NF	no factor TF: 69-70
2011-01-09	Adrian Rossi-Mastracci	NF-PM1	B1=590000, B2=15782500
2008-11-18	ITS	NF	no factor TF: 1-69
2008-11-14	ITS	NF	no factor TF: 1-69
2008-09-15	Derek	NF	no factor TF: 1-64
2003-11-08	-anonymous-	NF	no factor TF: 1-60
2003-08-31	-anonymous-	NF	no factor TF: 1-59
2003-08-25	-anonymous-	NF	no factor TF: 1-59
2002-01-15	-anonymous-	NF	no factor TF: 1-58
2001-04-21	-anonymous-	NF	no factor TF: 1-57
2000-04-19	-anonymous-	NF	no factor TF: 1-56
2000-02-09	-anonymous-	NF	no factor TF: 1-54
2000-01-04	-anonymous-	NF	no factor TF: 1-53
1999-10-15	-anonymous-	NF	no factor TF: 1-53