4 801 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 2 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
28807	5	14.8	old
103704204430042920654534504787275680122624123427136177026231599	63	206.0	2024-02-05 14:32:23

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	16136 / 40830

Estimated T-Level: 52.0 ⓘ

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
Factored	No proof (small exponent)	2017-09-21	Oliver Kruse	6395AC6F9DC11DEC	1	0	1	3
Factored	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	6395AC6F9DC11DEC	1	2720	1	3
Factored	No proof (small exponent)	2020-04-17	Oliver Kruse	B5D3FCF1B44C8FB5	1	3976	5	3
Factored	No proof (small exponent)	2024-02-03	Wentao Huang	B5D3FCF1B44C8FB5	1	3826	5	3
Verified	No proof (small exponent)	2024-02-06	Ryan Propper	B5D3FCF1B44C8FB5	2	2086	5	3

History

Date	User	Type	Result
2025-05-20	masser	NF-PP1	Start=97/11, B1=2100000000, B2=2097900000000
2024-02-06	Ryan Propper	C-PRP	M4801/28807/103704204430042920654534504787275680122624123427136177026231599 : B5D3FCF1B44C8FB5
2024-02-05	Ryan Propper	F-ECM	Factor: 103704204430042920654534504787275680122624123427136177026231599 / ECM curve 19, B1=260000000, B2=6083641994430, Edwards Sigma=6429022023549748
2024-02-03	Wentao Huang	C-PRP	M4801/28807 : B5D3FCF1B44C8FB5
2023-05-29	-anonymous-	NF-PM1	B1=66000000000, B2=662102605034570700
2021-07-09	ViliamF	NF-PM1	B1=1000000000, B2=201000000000
2020-04-17	Oliver Kruse	C-PRP	M4801/28807 : B5D3FCF1B44C8FB5
2017-10-12	kkmrkkblmbrbk	C-PRP	M4801/28807 : 6395AC6F9DC11DEC
2017-09-21	Oliver Kruse	C-PRP	M4801/28807 : 6395AC6F9DC11DEC
2017-09-21	Oliver Kruse	C-PRP	M4801/28807 : 6395AC6F9DC11DEC