61 987 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
257244325769609	15	47.9	old
10582875847131264447326060591	29	93.1	2017-01-03 21:36:36

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	597 / 4588

Estimated T-Level: 35.7 ⓘ

TF below 2^113 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	5E3C2E01C572E36C	2	0	1	3
Verified	2017-09-21	Oliver Kruse	5E3C2E01C572E36C	2	0	1	3
Verified	2017-11-06	kkmrkkblmbrbk	5E3C2E01C572E36C	2	32260	1	3
Verified	2020-04-17	Oliver Kruse	14A4E00A59FBC926	2	21424	5	3
Verified	2024-02-03	Wentao Huang	14A4E00A59FBC926	2	45731	5	3

History

Date	User	Type	Result
2024-02-03	Wentao Huang	C-PRP	M61987/257244325769609/10582875847131264447326060591 : 14A4E00A59FBC926 PRP: Verified PRP without proof (small exponent)
2022-11-20	George Woltman	NF-PM1	B1=1000000000, B2=89189520990570
2022-11-13	George Woltman	NF-PM1	B1=1000000000
2021-04-26	ATH	NF-PP1	Start=2/7, B1=10000000, B2=1000000000
2020-04-17	Oliver Kruse	C-PRP	M61987/257244325769609/10582875847131264447326060591 : 14A4E00A59FBC926 PRP: Verified PRP without proof (small exponent)
2017-11-06	kkmrkkblmbrbk	C-PRP	M61987/257244325769609/10582875847131264447326060591 : 5E3C2E01C572E36C PRP: Verified PRP without proof (small exponent)
2017-09-21	Oliver Kruse	C-PRP	M61987/257244325769609/10582875847131264447326060591 : 5E3C2E01C572E36C PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M61987/257244325769609/10582875847131264447326060591 : 5E3C2E01C572E36C PRP without proof (not generated)
2017-01-03	kkmrkkblmbrbk	F-ECM	Factor: 10582875847131264447326060591 / (ECM curve 55, B1=250000, B2=25000000)
2016-10-15	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=2000000000, E=12