8 154 967 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 1 known prime factor. Cofactor is composite.

Trial Factored to 2⁶⁹

TF target 2⁶⁷

Factored

Factor	Digits	Bits	Date
7153448277380308199	19	62.6	2016-03-08 18:41:31

ECM

Digits	B1	Curves
25	50000	3 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Factored	1999-09-07	Michael Phillips	97E26051BCFBAF22	6010612	Linux 32-bit,Prime95,v18,(aka WU2)
Factored	2002-08-17	Ing. Pavel PaJaSoft Janousek	97E26051BCFBAF22	6937390	Linux 32-bit,Prime95,v21,(aka WX2)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2018-09-01	Oliver Kruse	7360BE54BB243EA8	1	6164219	5	3
Verified	PRP without proof (not generated)	2020-02-22	marssystems	7360BE54BB243EA8	1	1630579	5	3

History

Date	User	Type	Result
2023-09-15	Flaukrotist	NF-PM1	B1=2200000, B2=1942916910
2023-09-07	Flaukrotist	NF	no factor TF: 68-69
2022-06-21	Flaukrotist	NF	no factor TF: 67-68
2020-02-22	marssystems	C-PRP	M8154967/7153448277380308199 : 7360BE54BB243EA8
2018-09-01	Oliver Kruse	C-PRP	M8154967/7153448277380308199 : 7360BE54BB243EA8
2016-03-08	TJAOI	F	Factor: 7153448277380308199
2015-12-03	snme2pm1	NF	no factor TF: 66-67
2015-05-28	snme2pm1	NF	no factor TF: 65-66
2013-12-27	David Campeau	NF	no factor TF: 64-65
2013-08-27	David Campeau	NF	no factor TF: 63-64
2012-11-04	Nesowa	NF-PM1	B1=100000, B2=1975000, E=6
2002-08-17	PaJaSoft	NF-PM1	B1=45000, B2=731250
2002-08-17	PaJaSoft	C-LL	97E26051BCFBAF22
1999-09-07	-anonymous-	C-LL	97E26051BCFBAF22
1998-09-13	-anonymous-	NF	no factor TF: 1-63