4 943 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 3 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
9887	4	13.3	old
128519	6	17.0	old
57070678388446261439582627582003350231	38	125.4	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	16942 / 40830

Estimated T-Level: 52.1 ⓘ

TF below 2^168 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	No proof (small exponent)	2017-09-21	Oliver Kruse	9CA22733E98C1BEA	3	0	1	3
Verified	No proof (small exponent)	2017-10-02	kkmrkkblmbrbk	9CA22733E98C1BEA	3	0	1	3
Verified	No proof (small exponent)	2017-12-07	ATH	9CA22733E98C1BEA	3	3430	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	DE642DC512B2A0C5	3	2161	5	3
Factored	No proof (small exponent)	2022-05-12	Jorge Coveiro	DE642DC512B2A0C5	1	4804	5	3
Verified	No proof (small exponent)	2024-02-03	Wentao Huang	DE642DC512B2A0C5	3	1761	5	3

History

Date	User	Type	Result
2025-05-23	masser	NF-PP1	Start=187/47, B1=2100000000, B2=2097900000000
2024-02-03	Wentao Huang	C-PRP	M4943/9887/57070678388446261439582627582003350231/128519 : DE642DC512B2A0C5
2023-05-31	-anonymous-	NF-PM1	B1=64000000000, B2=642189744639793350
2022-05-12	Jorge Coveiro	C-PRP	M4943/9887 : DE642DC512B2A0C5
2021-12-15	Oliver Kruse	NF-PM1	B1=1000000000, B2=1002849399191640
2021-12-14	ANONYMOUS	NF-PM1	B1=101101101, B2=242002648447560
2021-12-14	ANONYMOUS	NF-PM1	B1=1000000, B2=58539200499780
2020-04-17	Oliver Kruse	C-PRP	M4943/9887/128519/57070678388446261439582627582003350231 : DE642DC512B2A0C5
2017-12-07	ATH	C-PRP	M4943/9887/128519/57070678388446261439582627582003350231 : 9CA22733E98C1BEA
2017-10-02	kkmrkkblmbrbk	C-PRP	M4943/9887/128519/57070678388446261439582627582003350231 : 9CA22733E98C1BEA
2017-09-21	Oliver Kruse	C-PRP	M4943/known_factors : 9CA22733E98C1BEA