38 359 543 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 2⁷²

P-1

B1 =	600000
B2 =	12000000

Status	Date	User	Residue	Shift	Software
Verified	2008-06-22	Nigel Fish	97FCE0DC2F29F225	21662321	Windows,Prime95,v23,(aka WZ1)
Verified	2016-12-19	Dubslow	97FCE0DC2F29F225	5955566	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2019-05-27	Sid & Andy	NF	no factor TF: 72-73
2019-02-14	monst	NF	no factor TF: 71-72
2016-12-19	Dubslow	C-LL	97FCE0DC2F29F225
2014-12-24	Mark Rose	NF	no factor TF: 70-71
2014-12-24	Mark Rose	NF	no factor TF: 69-70
2014-07-10	HBendtz	NF-PM1	B1=600000, B2=12000000, E=12
2008-06-22	-anonymous-	C-LL	97FCE0DC2F29F225
2008-02-03	-anonymous-	NF-PM1	B1=545000
2008-02-03	-anonymous-	NF	no factor TF: 1-69
2006-07-10	-anonymous-	NF	no factor TF: 1-68
2003-09-14	-anonymous-	NF	no factor TF: 1-59
2003-09-09	-anonymous-	NF	no factor TF: 1-60