720 869 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
15270579729574031071777	23	73.7	2015-03-02 02:41:02

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	100 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Ken Kriesel	3CE1FE8B5EB9E77E	0
Verified (Factored)		Simon Burge	3CE1FE8B5EB9E77E	0
Verified (Factored)	2003-02-24	Brian J. Beesley	3CE1FE8B5EB9E77E	289270

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-27	Oliver Kruse	6F0DB53436843738	1	0	1	3
Verified	2017-10-13	Oliver Kruse	6F0DB53436843738	1	493523	1	3
Verified	2017-12-16	ATH	6F0DB53436843738	1	215915	1	3
Unverified (Reliable)	2020-04-20	Oliver Kruse	72E1127498AFA5__	1	508603	5	3

History

Date	User	Type	Result
2020-04-20	Oliver Kruse	C-PRP	M720869/15270579729574031071777 : 72E1127498AFA5__ PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-12-16	ATH	C-PRP	M720869/15270579729574031071777 : 6F0DB53436843738 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-10-13	Oliver Kruse	C-PRP	M720869/15270579729574031071777 : 6F0DB53436843738 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-27	Oliver Kruse	C-PRP	M720869/15270579729574031071777 : 6F0DB53436843738 PRP: Unverified (Reliable) PRP without proof (not generated)
2015-03-02	bam	F-ECM	Factor: 15270579729574031071777 / (ECM curve 2, B1=50000, B2=5000000)
2015-03-01	NR	NF	no factor from 2^61 to 2^62
2010-06-27	Architects Cubed	NF	no factor from 2^60 to 2^61
2008-12-01	Jayson King	NF-PM1	B1=5000000, B2=100000000, E=12
2008-10-12	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-10-12	Sturle Sunde	NF	no factor from 2^58 to 2^59