85 281 167 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with PRP test

TF

No factors below 2⁷⁶

TF target 2⁷⁵

P-1

B1 =	685000
B2 =	13528750

Status	Date	User	Residue	Shift	Type	Base
Verified	2019-05-24	ky0uraku	C193E77722C23C0D	57279272	1	3
Verified	2022-11-06	Jaytholomew	C193E77722C23C0D	30308943	1	3

History

Date	User	Type	Result
2022-11-06	curtisc	CERT	PRP Certification CERT proof power = 9 Proof certified good
2022-11-06	Jaytholomew	C-PRP	C193E77722C23C0D PRP proof power = 9 PRP: Verified Proof certified good
2019-05-24	ky0uraku	C-PRP	C193E77722C23C0D PRP: Verified PRP without proof (not generated)
2019-04-28	ATH	NF	no factor from 2^63 to 2^64
2019-04-28	ATH	NF	no factor from 2^1 to 2^63
2018-01-06	Oliver Kruse	NF-PM1	B1=685000, B2=13528750, E=12
2017-08-27	-Anonymous-	NF	no factor from 2^75 to 2^76
2017-08-27	-Anonymous-	NF	no factor from 2^74 to 2^75
2017-03-02	-Anonymous-	NF	no factor from 2^73 to 2^74
2017-03-02	-Anonymous-	NF	no factor from 2^72 to 2^73
2017-03-02	-Anonymous-	NF	no factor from 2^71 to 2^72
2013-07-24	willmore	NF	no factor from 2^70 to 2^71
2013-03-08	-Anonymous-	NF	no factor from 2^69 to 2^70
2013-02-25	SMoffat	NF	no factor from 2^68 to 2^69
2013-02-24	SMoffat	NF	no factor from 2^67 to 2^68
2013-02-23	SMoffat	NF	no factor from 2^66 to 2^67
2013-02-18	E.Lechner	NF	no factor from 2^65 to 2^66
2010-11-25	Architects Cubed	NF	no factor from 2^64 to 2^65