1 283 Exponent Status

PrimeNet Exponent Status

M_n

Details

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

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
4824675346114250541198242904214396192319	40	131.8	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	74906 / 194238

Estimated T-Level: 61.9 ⓘ

TF below 2^201 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
Verified	No proof (small exponent)	2017-09-25	csaba	2AC6FA81B13AFA6C	1	0	1	3
Verified	No proof (small exponent)	2017-09-26	George Woltman	2AC6FA81B13AFA6C	1	395	1	3
Verified	No proof (small exponent)	2017-10-02	kkmrkkblmbrbk	2AC6FA81B13AFA6C	1	0	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	12AFB9E5948AEB7F	1	527	5	3
Verified	No proof (small exponent)	2020-08-12	_p95holder_	12AFB9E5948AEB7F	1	576	5	3
Verified	No proof (small exponent)	2025-10-06	Dobri	12AFB9E5948AEB7F	1	641	5	3

History

Date	User	Type	Result
2025-10-06	Dobri	C-PRP	M1283/4824675346114250541198242904214396192319 : 12AFB9E5948AEB7F
2021-12-04	Oliver Kruse	NF-PM1	B1=2500000000000, B2=503160871613400
2021-07-19	ViliamF	NF-PP1	Start=2/7, B1=1000000000, B2=221000000000
2021-06-01	ZacHFX	NF-PP1	Start=2/7, B1=10000000, B2=1010000000
2021-03-27	nordi	NF-PM1	B1=1000000000000, B2=2232843418649129478
2020-11-30	Oliver Kruse	NF-PM1	B1=2500000000000, B2=400000000000000
2020-08-12	_p95holder_	C-PRP	M1283/4824675346114250541198242904214396192319 : 12AFB9E5948AEB7F
2020-04-17	Oliver Kruse	C-PRP	M1283/4824675346114250541198242904214396192319 : 12AFB9E5948AEB7F
2018-12-12	Joss	NF-PM1	B1=62000000000, B2=1400000000000, E=12
2018-12-11	Joss	NF-PM1	B1=62000000000, B2=620000000000, E=12
2018-12-11	Joss	NF-PM1	B1=62000000000, B2=400000000000, E=12
2018-12-11	Joss	NF-PM1	B1=62000000000, B2=200000000000, E=12
2018-12-11	Joss	NF-PM1	B1=62000000000, B2=102000000000, E=12
2018-12-09	Joss	NF-PM1	B1=30000000000
2018-12-09	Joss	NF-PM1	B1=20000000000
2018-12-08	Joss	NF-PM1	B1=10000000000
2017-10-02	kkmrkkblmbrbk	C-PRP	M1283/4824675346114250541198242904214396192319 : 2AC6FA81B13AFA6C
2017-09-26	George Woltman	C-PRP	M1283/4824675346114250541198242904214396192319 : 2AC6FA81B13AFA6C
2017-09-25	csaba	C-PRP	M1283/known_factors : 2AC6FA81B13AFA6C
2017-04-21	nordi	NF-PM1	B1=7974098357, B2=637927868521, E=12
2017-03-09	ZacHFX	F-ECM	Factor: 4824675346114250541198242904214396192319
2017-03-09	ZacHFX	NF-PM1	B1=1000000, B2=100000000, E=12
2001-05-20	-anonymous-	NF-PM1	B1=3000000000, B2=4290000000
2001-02-11	-anonymous-	NF-PM1	B1=1000000, B2=100000000
2001-02-11	-anonymous-	NF-PM1	B1=10000, B2=1000000
2000-07-12	-anonymous-	NF	no factor TF: 1-56
2000-01-19	-anonymous-	NF	no factor TF: 54-55

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