50 511 833 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	2010-09-30	-anonymous-	FB3628DCB556C4E3	26633473	Windows,Prime95,v25.8,build 5
Verified	2020-04-11	Dubslow	FB3628DCB556C4E3	18021752	Linux 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2020-04-11	Dubslow	C-LL	FB3628DCB556C4E3
2019-06-02	TheJudger	NF	no factor TF: 73-74
2015-12-14	AirSquirrels	NF	no factor TF: 72-73
2015-11-08	Judge Hale	NF	no factor TF: 71-72
2015-11-08	Judge Hale	NF	no factor TF: 70-71
2014-12-19	monst	NF	no factor TF: 69-70
2010-09-30	-anonymous-	C-LL	FB3628DCB556C4E3
2010-07-24	-anonymous-	NF-PM1	B1=590000, B2=15782500
2008-11-18	Jan Kuipers	NF	no factor TF: 1-69
2008-10-27	Jan Kuipers	NF	no factor TF: 1-69
2008-08-24	Derek	NF	no factor TF: 1-64
2003-11-08	-anonymous-	NF	no factor TF: 1-60
2003-08-25	-anonymous-	NF	no factor TF: 1-59
2002-01-02	-anonymous-	NF	no factor TF: 1-58
2001-04-15	-anonymous-	NF	no factor TF: 1-57
2000-04-12	-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
1999-10-07	-anonymous-	NF	no factor TF: 1-53