38 482 537 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	2008-01-15	AlexPC	62A0FC534A565D9B	37410345	Windows,Prime95,v24 final,(aka Wc1)
Verified	2017-01-24	Dubslow	62A0FC534A565D9B	37618253	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2019-06-02	Sid & Andy	NF	no factor TF: 72-73
2019-04-12	monst	NF	no factor TF: 71-72
2017-01-24	Dubslow	C-LL	62A0FC534A565D9B
2014-12-04	chalsall	NF	no factor TF: 70-71
2014-11-25	Mark Rose	NF	no factor TF: 69-70
2014-07-17	HBendtz	NF-PM1	B1=600000, B2=12000000, E=12
2008-01-15	-anonymous-	C-LL	62A0FC534A565D9B
2007-08-14	-anonymous-	NF-PM1	B1=550000
2006-07-25	Superbob	NF	no factor TF: 1-69
2003-09-14	-anonymous-	NF	no factor TF: 1-60
2003-09-14	-anonymous-	NF	no factor TF: 1-59