8 320 681 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 2⁶⁸

TF target 2⁶⁸

Factored

Factor	Digits	Bits	Date
23930903181185347639	20	64.4	2014-01-06 18:24:38

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	1999-11-17	Kent Lee	1306300DED921737	5360727	Windows,Prime95,v18,(aka WU1)
Factored	2002-11-24	Andrew Aylett	1306300DED921737	2354755	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)	2018-10-09	trebor	BF7D60FBC563E39C	1	6359842	5	3
Verified	PRP without proof (not generated)	2020-04-18	marssystems	BF7D60FBC563E39C	1	316067	5	3

History

Date	User	Type	Result
2025-03-14	beep	NF-PM1	B1=1750000, B2=6798611820
2020-04-18	marssystems	C-PRP	M8320681/23930903181185347639 : BF7D60FBC563E39C
2018-10-09	trebor	C-PRP	M8320681/23930903181185347639 : BF7D60FBC563E39C
2014-01-06	David Campeau	F	Factor: 23930903181185347639 / TF: 64-65
2012-07-31	firejuggler	NF-PM1	B1=95000, B2=1662500, E=6
2002-11-24	-anonymous-	C-LL	1306300DED921737
2002-09-22	-anonymous-	NF-PM1	B1=40000, B2=390000
2002-09-14	-anonymous-	NF	no factor TF: 1-64
1999-11-17	-anonymous-	C-LL	1306300DED921737
1998-10-04	bezahar	NF	no factor TF: 1-63
1998-09-13	-anonymous-	NF	no factor TF: 1-61