4 283 Exponent Status

PrimeNet Exponent Status

M_n

Details

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

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Assignments

Assigned	User	Work Type	Stage	% Done	Updated	Est Complete	Expired
2025-10-15	Phyxick	ECM			2025-10-15	1970-01-01

Factored

Factor	Digits	Bits	Date
80203116140787492698009223167	29	96.0	old
1014581894481062086635266411284139009925301539055947709872564246847	67	219.3	2021-04-15 23:46:11

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	2804 / 16550

Estimated T-Level: 45.8 ⓘ

TF below 2^147 is very unlikely to find new factors due to ECM effort.

PRP Cofactor

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	No proof (small exponent)	2017-09-21	Oliver Kruse	665095E1DA15F9CD	1	0	1	3
Factored	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	665095E1DA15F9CD	1	616	1	3
Factored	No proof (small exponent)	2020-04-17	Oliver Kruse	B84DC619AA50CC69	1	2695	5	3
Verified	No proof (small exponent)	2021-04-16	mnd9	B84DC619AA50CC69	2	1209	5	3
Verified	No proof (small exponent)	2021-04-16	_p95holder_	B84DC619AA50CC69	2	3783	5	3
Verified	No proof (small exponent)	2021-04-19	Klaus Nordmann	B84DC619AA50CC69	2	3701	5	3

History

Date	User	Type	Result
2025-05-13	masser	NF-PP1	Start=159/71, B1=2600000000, B2=2597400000000
2023-05-20	-anonymous-	NF-PM1	B1=75000000000, B2=751710476301835050
2021-07-05	ViliamF	NF-PM1	B1=1000000000, B2=201000000000
2021-04-19	Klaus Nordmann	C-PRP	M4283/80203116140787492698009223167/1014581894481062086635266411284139009925301539055947709872564246847 : B84DC619AA50CC69
2021-04-16	_p95holder_	C-PRP	M4283/80203116140787492698009223167/1014581894481062086635266411284139009925301539055947709872564246847 : B84DC619AA50CC69
2021-04-16	mnd9	C-PRP	M4283/80203116140787492698009223167/1014581894481062086635266411284139009925301539055947709872564246847 : B84DC619AA50CC69
2021-04-15	Ryan Propper	F-ECM	Factor: 1014581894481062086635266411284139009925301539055947709872564246847
2020-04-17	Oliver Kruse	C-PRP	M4283/80203116140787492698009223167 : B84DC619AA50CC69
2017-10-12	kkmrkkblmbrbk	C-PRP	M4283/80203116140787492698009223167 : 665095E1DA15F9CD
2017-09-21	Oliver Kruse	C-PRP	M4283/80203116140787492698009223167 : 665095E1DA15F9CD
2017-09-21	Oliver Kruse	C-PRP	M4283/80203116140787492698009223167 : 665095E1DA15F9CD
2003-01-16	-anonymous-	NF	no factor TF: 1-57
2003-01-09	-anonymous-	NF-PM1	B1=4290000000
2002-09-22	-anonymous-	NF-PM1	B1=3221225472, B2=4290000000, E=48
2002-08-03	-anonymous-	NF-PM1	B1=2147483648, B2=4290000000, E=48
2002-06-02	-anonymous-	NF-PM1	B1=1073741824, B2=4290000000, E=48
2001-07-17	-anonymous-	NF-PM1	B1=3000000000, B2=4290000000
2001-06-17	-anonymous-	NF-PM1	B1=43000000, B2=4290000000
2001-02-11	-anonymous-	NF-PM1	B1=1000000, B2=100000000
2000-08-31	-anonymous-	NF	no factor TF: 1-56
2000-02-16	-anonymous-	NF	no factor TF: 54-55
1999-12-23	-anonymous-	NF	no factor TF: 53-54
1999-09-22	-anonymous-	NF	no factor TF: 52-53

Username
Password