83 703 989 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 2⁷⁶

TF target 2⁷⁵

P-1

B1 =	670000
B2 =	13065000

Status	Date	User	Residue	Shift	Software
Verified	2019-04-14	-anonymous-	1F62B513F568DA70	23888818	Windows 64-bit,Prime95,v29.4,build 5
Verified	2026-01-10	invisi	1F62B513F568DA70	27778877	Linux 64-bit,Prime95,v30.19,build 20

History

Date	User	Type	Result
2026-01-10	invisi	C-LL	1F62B513F568DA70
2019-04-14	-anonymous-	C-LL	1F62B513F568DA70
2019-02-04	ATH	NF	no factor TF: 63-64
2019-02-04	ATH	NF	no factor TF: 1-63
2017-02-26	TheJudger	NF-PM1	B1=670000, B2=13065000, E=12
2017-02-03	-anonymous-	NF	no factor TF: 72-73
2017-02-03	-anonymous-	NF	no factor TF: 73-74
2017-02-03	-anonymous-	NF	no factor TF: 74-75
2017-02-03	-anonymous-	NF	no factor TF: 75-76
2017-02-03	-anonymous-	NF	no factor TF: 71-72
2013-11-19	PED	NF	no factor TF: 70-71
2013-06-13	PascalBieri	NF	no factor TF: 69-70
2013-02-24	Charles A. Morris	NF	no factor TF: 68-69
2013-02-21	Charles A. Morris	NF	no factor TF: 67-68
2013-02-18	-anonymous-	NF	no factor TF: 66-67
2012-08-30	Carsten Kossendey	NF	no factor TF: 65-66
2010-12-21	Architects Cubed	NF	no factor TF: 64-65