1 861 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
1023551	7	20.0	old
2735671	7	21.4	old
33384230094125728479194737	26	84.8	old
572590482607449584967217450937	30	98.9	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	16550 / 16550
55	110000000	40830 / 40830
60	260000000	105362 / 105362
65	800000000	64204 / 194238

Estimated T-Level: 61.7 ⓘ

TF below 2^200 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	D614AD651F8B140D	4	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	D614AD651F8B140D	4	0	1	3
Verified	2017-12-07	ATH	D614AD651F8B140D	4	504	1	3
Verified	2020-04-17	Oliver Kruse	1558D7A7DDFC480B	4	535	5	3
Verified	2020-08-12	_p95holder_	1558D7A7DDFC480B	4	232	5	3

History

Date	User	Type	Result
2022-11-03	mikr	NF-PM1	B1=400000000000, B2=2575888041040674360
2021-07-25	ViliamF	NF-PP1	Start=2/7, B1=1000000000, B2=221000000000
2020-08-12	_p95holder_	C-PRP	M1861/1023551/2735671/33384230094125728479194737/572590482607449584967217450937 : 1558D7A7DDFC480B PRP: Verified PRP without proof (small exponent)
2020-04-17	Oliver Kruse	C-PRP	M1861/1023551/2735671/33384230094125728479194737/572590482607449584967217450937 : 1558D7A7DDFC480B PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M1861/1023551/2735671/33384230094125728479194737/572590482607449584967217450937 : D614AD651F8B140D PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M1861/1023551/2735671/33384230094125728479194737/572590482607449584967217450937 : D614AD651F8B140D PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M1861/known_factors : D614AD651F8B140D PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=1000000000, B2=100000000000, E=12