281 063 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
270671023448304718641550697	27	87.8	2016-05-13 12:46:52

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	207 / 1566

Estimated T-Level: 30.7 ⓘ

TF below 2^97 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	2B1C	0
Verified (Factored)		Unknown	2B1C	0
Verified (Factored)		Brian J. Beesley	02DE714E3157AB1C	0
Verified (Factored)		Eivind Triel	02DE714E3157AB1C	37092
Verified (Factored)	2002-03-03	Brian J. Beesley	02DE714E3157AB1C	54674

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-22	Oliver Kruse	57094000DD726A0D	1	0	1	3
Verified	2017-10-12	Oliver Kruse	57094000DD726A0D	1	125827	1	3
Verified	2017-11-06	kkmrkkblmbrbk	57094000DD726A0D	1	230002	1	3
Unverified (Reliable)	2020-04-17	Oliver Kruse	99733062602D09__	1	167077	5	3

P-1 factors

Date	Factor	B1	B2
2016-05-13	270671023448304718641550697	60000000	3000000000

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2020-04-17	Oliver Kruse	C-PRP	M281063/270671023448304718641550697 : 99733062602D09__ PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-11-06	kkmrkkblmbrbk	C-PRP	M281063/270671023448304718641550697 : 57094000DD726A0D PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-10-12	Oliver Kruse	C-PRP	M281063/270671023448304718641550697 : 57094000DD726A0D PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-22	Oliver Kruse	C-PRP	M281063/270671023448304718641550697 : 57094000DD726A0D PRP: Unverified (Reliable) PRP without proof (not generated)
2017-09-22	Oliver Kruse	C-PRP	M281063/270671023448304718641550697 : 57094000DD726A0D PRP without proof (not generated)
2016-05-13	Numberwang	NF-PM1	B1=3143, B2=78575
2016-05-13	mikr	F-PM1	Factor: 270671023448304718641550697 / (P-1, B1=60000000, B2=3000000000, E=12)
2016-01-04	Gordon Spence	NF	no factor from 2^63 to 2^64
2016-01-04	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-13	NR	NF	no factor from 2^61 to 2^62
2013-11-01	David Campeau	NF-PM1	B1=5335000, B2=202730000, E=12
2013-06-24	lycorn	NF	no factor from 2^60 to 2^61
2012-05-15	Joss	NF-PM1	B1=5166927
2012-02-26	Joss	NF-PM1	B1=2152886
2011-02-16	Joss	NF-PM1	B1=2000000
2009-01-23	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