7 665 751 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
359024478196565443127082697	27	88.2	2020-05-25 01:07:33

P-1 factors

Date	Factors	B1	B2
2020-05-25	359024478196565443127082697	1337698	1337698

ECM

Digits	B1	Curves
25	50000	53 / 280

Estimated T-Level: 20.9 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Factored	1999-10-29	Kevin England	70EEA3AC65126A41	1064562	Windows,Prime95,v19,(aka WV1)
Factored	2002-10-12	arnaud	70EEA3AC65126A41	1898347	Windows,Prime95,v21,(aka WX1)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2020-05-26	riccardo uberti	8782C1E5DAAA5A79	1	7024179	5	3
Verified	PRP without proof (not generated)	2020-05-26	marssystems	8782C1E5DAAA5A79	1	4079586	5	3

History

Date	User	Type	Result
2025-10-18	Sid & Andy	NF-PM1	B1=2400000, B2=3647339850
2021-07-26	riccardo uberti	NF-PP1	Start=6/5, B1=1500000, B2=30000000
2021-07-18	riccardo uberti	NF-PP1	Start=2/7, B1=1500000, B2=30000000
2020-05-26	marssystems	C-PRP	M7665751/359024478196565443127082697 : 8782C1E5DAAA5A79
2020-05-26	riccardo uberti	C-PRP	M7665751/359024478196565443127082697 : 8782C1E5DAAA5A79
2020-05-25	GdS	F-PM1	Factor: 359024478196565443127082697 / B1=1337698
2020-03-20	TJAOI	NF	no factor TF: 68-69
2018-07-31	ramgeis	NF	no factor TF: 67-68
2016-09-19	Gordon Spence	NF	no factor TF: 66-67
2015-06-12	VictordeHollander	NF	no factor TF: 65-66
2013-12-07	David Campeau	NF	no factor TF: 64-65
2013-10-11	Nesowa	NF	no factor TF: 63-64
2012-08-01	Nesowa	NF-PM1	B1=95000, B2=1757500, E=6
2002-10-12	arnaud	C-LL	70EEA3AC65126A41
2002-05-25	arnaud	NF-PM1	B1=35000, B2=332500
1999-10-29	-anonymous-	C-LL	70EEA3AC65126A41
1998-08-30	MadPoo 🙂	NF	no factor TF: 1-63
1998-08-02	-anonymous-	NF	no factor TF: 1-61