84 171 821 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 PRP test

No factors below 2⁷⁶

TF target 2⁷⁵

P-1

B1 =	675000
B2 =	13331250

Status	Proof	Date	User	Residue	Shift	Type	Base
Verified	PRP without proof (not generated)	2018-12-22	irowiki	CC9B40B4D47A0EB1	18443113	1	3
Verified	PRP without proof (not generated)	2021-11-10	ATH	CC9B40B4D47A0EB1	0	1	3

History

Date	User	Type	Result
2021-11-10	ATH	C-PRP	CC9B40B4D47A0EB1
2018-12-22	irowiki	C-PRP	CC9B40B4D47A0EB1
2017-10-29	TheJudger	NF-PM1	B1=675000, B2=13331250, E=12
2017-05-16	Kevin Jaget	NF	no factor TF: 74-75
2017-05-16	Kevin Jaget	NF	no factor TF: 75-76
2017-03-08	RichD0	NF	no factor TF: 73-74
2017-01-06	Judge Hale	NF	no factor TF: 71-72
2017-01-06	Judge Hale	NF	no factor TF: 72-73
2014-08-30	SMoffat	NF	no factor TF: 70-71
2014-02-19	SMoffat	NF	no factor TF: 69-70
2014-02-13	SMoffat	NF	no factor TF: 68-69
2014-02-11	SMoffat	NF	no factor TF: 67-68
2013-12-11	GrunwalderGIMP	NF	no factor TF: 66-67
2012-08-21	Carsten Kossendey	NF	no factor TF: 65-66
2010-12-09	Architects Cubed	NF	no factor TF: 64-65