38 273 689 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 2⁷⁵

TF target 2⁷¹

P-1

B1 =	410000
B2 =	4817500

Status	Date	User	Residue	Shift	Software
Verified	2007-05-28	Arne Vik	56A53AD9EDC999C0	38152140	Windows,Prime95,v24 final,(aka Wc1)
Verified	2015-10-30	ATH	56A53AD9EDC999C0	4304946	Windows 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2024-05-21	James Heinrich	NF	no factor TF: 68-69
2020-12-28	-anonymous-	NF	no factor TF: 74-75
2020-02-16	-anonymous-	NF	no factor TF: 73-74
2019-10-18	-anonymous-	NF	no factor TF: 72-73
2019-10-18	-anonymous-	NF	no factor TF: 71-72
2015-10-30	ATH	C-LL	56A53AD9EDC999C0
2015-10-29	Saeres	C-LL	00000000000000__
2014-12-02	NickOfTime	NF	no factor TF: 70-71
2014-11-21	HBendtz	NF	no factor TF: 69-70
2012-09-25	Carsten Kossendey	NF	no factor TF: 68-69
2007-05-28	Arne Vik	C-LL	56A53AD9EDC999C0
2007-04-07	Arne Vik	NF-PM1	B1=410000, B2=4817500
2006-07-10	-anonymous-	NF	no factor TF: 1-68
2006-07-10	-anonymous-	NF	no factor TF: 1-68
2006-06-13	-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