38 833 217 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 2⁷²

P-1

B1 =	455000
B2 =	9782500

Status	Date	User	Residue	Shift	Software
Bad	2007-12-31	Kyle Schmidt	DD03D296546A36CC	22214472	Windows,Prime95,v24 final,(aka Wc1)
Verified	2016-02-23	MadPoo 🙂	1A125A1F0AD2FB13	3310955	Windows 64-bit,Prime95,v26,(aka We4)
Verified	2016-04-16	AirSquirrels	1A125A1F0AD2FB13	0	clLucas v1.04

History

Date	User	Type	Result
2021-02-19	-anonymous-	NF	no factor TF: 74-75
2020-02-14	-anonymous-	NF	no factor TF: 73-74
2019-10-11	LaurV	NF	no factor TF: 72-73
2019-05-01	monst	NF	no factor TF: 71-72
2016-04-16	AirSquirrels	C-LL	1A125A1F0AD2FB13
2016-02-23	MadPoo 🙂	C-LL	1A125A1F0AD2FB13
2014-12-06	NickOfTime	NF	no factor TF: 70-71
2014-12-01	Mark Rose	NF	no factor TF: 69-70
2013-08-25	Le Comte	NF	no factor TF: 68-69
2007-12-31	Kyle Z Schmidt	C-LL	DD03D296546A36CC
2007-10-17	Kyle Z Schmidt	NF-PM1	B1=455000, B2=9782500
2006-08-14	Team Prime Rib	NF	no factor TF: 1-68
2003-09-29	-anonymous-	NF	no factor TF: 1-60
2003-09-21	-anonymous-	NF	no factor TF: 1-59
2001-02-18	Joss	NF	no factor TF: 1-56