347 197 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
244784048224303208360886319	27	87.7	2019-03-24 14:16:03

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	286 / 640

Estimated T-Level: 27.2 ⓘ

TF below 2^85 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	12B9	0
Verified (Factored)		Unknown	12B9	0
Verified (Factored)		Guillermo Ballester Valor	FCACD454B7C212B9	0
Verified (Factored)		Eivind Triel	FCACD454B7C212B9	246944
Verified (Factored)	2002-02-03	Dennis Pope	FCACD454B7C212B9	178577

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-03-25	_p95holder_	C5E1650AA1D068C7	1	1032	5	3
Verified	2019-03-25	ANONYMOUS	C5E1650AA1D068C7	1	148233	5	3
Verified	2019-03-26	kkmrkkblmbrbk	C5E1650AA1D068C7	1	176131	5	3
Verified	2019-03-26	_p95holder_	C5E1650AA1D068C7	1	186074	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-03-26	_p95holder_	C-PRP	M347197/244784048224303208360886319 : C5E1650AA1D068C7 PRP: Verified PRP without proof (small exponent)
2019-03-26	kkmrkkblmbrbk	C-PRP	M347197/244784048224303208360886319 : C5E1650AA1D068C7 PRP: Verified PRP without proof (small exponent)
2019-03-25	ANONYMOUS	C-PRP	M347197/244784048224303208360886319 : C5E1650AA1D068C7 PRP: Verified PRP without proof (small exponent)
2019-03-25	_p95holder_	C-PRP	M347197/244784048224303208360886319 : C5E1650AA1D068C7 PRP: Verified PRP without proof (small exponent)
2019-03-24	alex	F-ECM	Factor: 244784048224303208360886319 / (ECM curve 110, B1=250000, B2=25000000, Sigma=8502355018062506)
2018-02-21	BloodERazor	NF	no factor from 2^64 to 2^65
2016-10-31	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2015-12-18	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-12-18	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-07-25	NR	NF	no factor from 2^61 to 2^62
2013-06-11	lycorn	NF	no factor from 2^60 to 2^61
2012-02-11	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2011-08-14	Joss	NF-PM1	B1=1309541
2009-01-26	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-31	Sturle Sunde	NF	no factor from 2^58 to 2^59