287 939 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
27265853414344474964957059537	29	94.5	2019-04-01 21:36:59

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	464 / 640

Estimated T-Level: 28.6 ⓘ

TF below 2^90 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	1B24	0
Verified (Factored)		Unknown	1B24	0
Verified (Factored)		Brian J. Beesley	AB412D3941929B24	0
Verified (Factored)		Guillermo Ballester Valor	AB412D3941929B24	0
Verified (Factored)		Eivind Triel	AB412D3941929B24	271772
Verified (Factored)	2016-06-01	MadPoo	AB412D3941929B24	160876

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-04-02	ANONYMOUS	AEB91137A0A61DAC	1	175771	5	3
Verified	2019-04-02	artorollo	AEB91137A0A61DAC	1	159528	5	3

P-1 factors

Date	Factor	B1	B2
2019-04-01	27265853414344474964957059537	100000000	2000000000

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-04-02	artorollo	C-PRP	M287939/27265853414344474964957059537 : AEB91137A0A61DAC PRP: Verified PRP without proof (small exponent)
2019-04-02	ANONYMOUS	C-PRP	M287939/27265853414344474964957059537 : AEB91137A0A61DAC PRP: Verified PRP without proof (small exponent)
2019-04-01	alex	F-PM1	Factor: 27265853414344474964957059537 / (P-1, B1=100000000, B2=2000000000, E=12)
2018-03-29	Gordon Spence	NF	no factor from 2^64 to 2^65
2018-03-27	BloodERazor	NF	no factor from 2^64 to 2^65
2016-06-01	MadPoo	C-LL	AB412D3941929B24
2016-01-07	Gordon Spence	NF	no factor from 2^63 to 2^64
2016-01-07	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-13	NR	NF	no factor from 2^61 to 2^62
2013-06-27	lycorn	NF	no factor from 2^60 to 2^61
2012-08-09	markr	NF-PM1	B1=10000000, B2=500000000, E=12
2012-08-07	markr	NF-PM1	B1=10000000, B2=400000000, E=12
2011-07-26	Joss	NF-PM1	B1=1669171
2011-06-27	Joss	NF-PM1	B1=1001502
2009-01-24	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-02	Sturle Sunde	NF	no factor from 2^58 to 2^59