355 031 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
147511505886873145194042863	27	86.9	2019-03-21 13:15:38

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	347 / 640

Estimated T-Level: 27.7 ⓘ

TF below 2^87 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	335E	0
Verified (Factored)		Unknown	335E	0
Verified (Factored)		Ken Kriesel	CBB16D41EFBC335E	0
Verified (Factored)		Brian J. Beesley	CBB16D41EFBC335E	0
Verified (Factored)		Eivind Triel	CBB16D41EFBC335E	246595
Verified (Factored)	2016-06-01	MadPoo	CBB16D41EFBC335E	218541

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-03-22	_p95holder_	DEA93675EB80F164	1	304736	5	3
Verified	2019-03-22	ANONYMOUS	DEA93675EB80F164	1	173599	5	3
Verified	2019-03-23	kkmrkkblmbrbk	DEA93675EB80F164	1	258756	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-03-23	kkmrkkblmbrbk	C-PRP	M355031/147511505886873145194042863 : DEA93675EB80F164 PRP: Verified PRP without proof (small exponent)
2019-03-22	ANONYMOUS	C-PRP	M355031/147511505886873145194042863 : DEA93675EB80F164 PRP: Verified PRP without proof (small exponent)
2019-03-22	_p95holder_	C-PRP	M355031/147511505886873145194042863 : DEA93675EB80F164 PRP: Verified PRP without proof (small exponent)
2019-03-21	alex	F-ECM	Factor: 147511505886873145194042863 / (ECM curve 97, B1=250000, B2=25000000, Sigma=7629279709419494)
2018-02-22	Gordon Spence	NF	no factor from 2^64 to 2^65
2018-02-21	BloodERazor	NF	no factor from 2^64 to 2^65
2016-11-09	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2016-06-01	MadPoo	C-LL	CBB16D41EFBC335E
2015-12-20	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-12-19	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-07-26	NR	NF	no factor from 2^61 to 2^62
2013-05-21	lycorn	NF	no factor from 2^60 to 2^61
2012-02-20	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2011-08-09	Joss	NF-PM1	B1=1272198
2009-01-26	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-30	Sturle Sunde	NF	no factor from 2^58 to 2^59