42 703 169 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 =	570000
B2 =	11542500

Status	Date	User	Residue	Shift	Software
Bad	2008-05-22	Jim Hunt	AD3CE882267B5EB1	11035305	Windows,Prime95,v24 final,(aka Wc1)
Bad	2017-04-12	Xolotl	0000000000000000	34075460	Linux 64-bit,Prime95,v28.9,build 2
Verified	2017-04-13	MadPoo 🙂	904198D336642186	41498110	Windows 64-bit,Prime95,v26,(aka We4)
Verified	2017-04-14	ATH	904198D336642186	16376023	Windows 64-bit,Prime95,v28.9,build 2

History

Date	User	Type	Result
2024-06-25	Greg	NF	no factor TF: 70-71
2018-12-08	Architects Cubed	NF-PM1	B1=570000, B2=11542500, E=12
2018-10-13	Random GPUs	NF	no factor TF: 72-73
2017-04-14	ATH	C-LL	904198D336642186
2017-04-13	MadPoo 🙂	C-LL	904198D336642186
2017-04-12	Xolotl	C-LL	7CA7623CF184FD__
2015-09-01	-anonymous-	NF	no factor TF: 71-72
2015-04-16	kracker	NF	no factor TF: 70-71
2014-08-08	Grant McCracken	NF	no factor TF: 69-70
2014-01-04	LaurV	NF	no factor TF: 68-69
2008-05-21	-anonymous-	C-LL	AD3CE882267B5EB1
2008-03-29	-anonymous-	NF-PM1	B1=715000
2007-07-04	Jonathan Crombie	NF	no factor TF: 1-68