4 129 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
1585537	7	20.6	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	19457 / 40830

Estimated T-Level: 52.4 ⓘ

TF below 2^169 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	23C2219D156655A9	1	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	23C2219D156655A9	1	3100	1	3
Verified	2017-12-07	ATH	23C2219D156655A9	1	2502	1	3
Verified	2020-04-17	Oliver Kruse	7E23883A5F9636F4	1	1716	5	3
Verified	2023-05-17	-Anonymous-	7E23883A5F9636F4	1	3473	5	3

History

Date	User	Type	Result
2023-05-17	-Anonymous-	C-PRP	M4129/1585537 : 7E23883A5F9636F4 PRP: Verified PRP without proof (small exponent)
2023-05-17	-Anonymous-	NF-PM1	B1=78000000000, B2=782159992887753480
2020-04-17	Oliver Kruse	C-PRP	M4129/1585537 : 7E23883A5F9636F4 PRP: Verified PRP without proof (small exponent)
2019-02-18	Joss	NF-PM1	B1=100000000000, B2=10000000000000, E=12
2019-02-15	Joss	NF-PM1	B1=100000000000, B2=5000000000000, E=12
2019-02-14	Joss	NF-PM1	B1=100000000000, B2=2500000000000, E=12
2019-02-12	Joss	NF-PM1	B1=20000000000
2019-02-11	Joss	NF-PM1	B1=10000000000
2017-12-07	ATH	C-PRP	M4129/1585537 : 23C2219D156655A9 PRP: Verified PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M4129/1585537 : 23C2219D156655A9 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M4129/1585537 : 23C2219D156655A9 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M4129/1585537 : 23C2219D156655A9 PRP without proof (not generated)