614 981 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
586998438175838840071447	24	79.0	2015-02-21 01:55:11

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	215 / 640

Estimated T-Level: 26.7 ⓘ

TF below 2^84 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	21C0	0
Verified (Factored)		Paul McJones	240ABD3BECE961C0	0
Verified (Factored)		Brian J. Beesley	240ABD3BECE961C0	0

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-27	Oliver Kruse	76FFDDF6496D688D	1	0	1	3
Verified	2017-10-13	Oliver Kruse	76FFDDF6496D688D	1	173385	1	3
Verified	2017-12-15	ATH	76FFDDF6496D688D	1	416724	1	3
Unverified (Reliable)	2020-04-19	Oliver Kruse	728E0F8DF080E5__	1	389044	5	3

History

Date	User	Type	Result
2023-01-05	USAFSS	NF-PM1	B1=1750000, B2=5399784390
2020-04-19	Oliver Kruse	C-PRP	M614981/586998438175838840071447 : 728E0F8DF080E5__ PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-12-15	ATH	C-PRP	M614981/586998438175838840071447 : 76FFDDF6496D688D PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-10-13	Oliver Kruse	C-PRP	M614981/586998438175838840071447 : 76FFDDF6496D688D PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-27	Oliver Kruse	C-PRP	M614981/586998438175838840071447 : 76FFDDF6496D688D PRP: Unverified (Reliable) PRP without proof (not generated)
2015-02-21	bam	F-ECM	Factor: 586998438175838840071447 / (ECM curve 2, B1=50000, B2=5000000)
2013-10-19	David Campeau	NF-PM1	B1=1270000, B2=40640000, E=12
2012-08-01	Joss	NF-PM1	B1=1229962
2012-03-10	Joss	NF-PM1	B1=780013
2011-08-31	Joss	NF-PM1	B1=624010
2011-07-10	Joss	NF-PM1	B1=374406
2011-01-25	Sid & Andy	NF	no factor from 2^60 to 2^61
2008-10-13	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-10-13	Sturle Sunde	NF	no factor from 2^58 to 2^59