49 941 233 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 2⁷³

TF target 2⁷³

P-1

B1 =	555000
B2 =	13320000

Status	Date	User	Residue	Shift	Software
Verified	2010-10-26	Eledill	4009ED24E9EC0DC7	23260849	Windows,Prime95,v25.9,build 4
Verified	2020-01-28	Dubslow	4009ED24E9EC0DC7	49806897	Linux 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2020-01-28	Dubslow	C-LL	4009ED24E9EC0DC7
2018-01-15	monst	NF	no factor TF: 72-73
2015-12-04	-anonymous-	NF	no factor TF: 71-72
2015-05-14	Mark Rose	NF	no factor TF: 70-71
2010-10-26	Eledill	C-LL	4009ED24E9EC0DC7
2010-09-08	Eledill	NF-PM1	B1=555000, B2=13320000
2008-09-06	ahmerali	NF	no factor TF: 1-70
2001-10-20	-anonymous-	NF	no factor TF: 1-58
2001-02-18	-anonymous-	NF	no factor TF: 1-57
2000-03-27	-anonymous-	NF	no factor TF: 1-56
2000-02-09	-anonymous-	NF	no factor TF: 1-54
1999-12-23	-anonymous-	NF	no factor TF: 1-53
1999-12-23	-anonymous-	NF	no factor TF: 1-53