844 639 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
90713690858670076583	20	66.3	2009-08-15 23:16:12
81961396587467235653199169	26	86.1	2017-11-03 14:21:59

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)		David Slowinski	3BB7	0
Verified (Factored)		Paul Victor Novarese	629C1E158DC8FBB7	0
Verified (Factored)		Ken Kriesel	629C1E158DC8FBB7	0

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-28	Oliver Kruse	613BDA7E8CB89638	1	0	1	3
Verified (Factored)	2017-10-14	Oliver Kruse	613BDA7E8CB89638	1	138810	1	3
Verified	2017-11-04	kkmrkkblmbrbk	4CB024680EDA6B3E	2	648830	5	3
Verified	2017-11-04	ATH	4CB024680EDA6B3E	2	594616	5	3

History

Date	User	Type	Result
2017-11-04	ATH	C-PRP	M844639/90713690858670076583/81961396587467235653199169 : 4CB024680EDA6B3E PRP: Verified PRP without proof (small exponent)
2017-11-04	kkmrkkblmbrbk	C-PRP	M844639/90713690858670076583/81961396587467235653199169 : 4CB024680EDA6B3E PRP: Verified PRP without proof (small exponent)
2017-11-03	TJAOI	F-ECM	Factor: 81961396587467235653199169 / (ECM curve 83, B1=50000, B2=5000000)
2017-10-14	Oliver Kruse	C-PRP	M844639/90713690858670076583 : 613BDA7E8CB89638 PRP: Verified PRP without proof (small exponent)
2017-09-28	Oliver Kruse	C-PRP	M844639/90713690858670076583 : 613BDA7E8CB89638 PRP: Verified PRP without proof (not generated)
2009-08-15	JimBa	F-ECM	Factor: 90713690858670076583
2008-10-13	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-10-13	Sturle Sunde	NF	no factor from 2^58 to 2^59