is 2 12666361 - 1
has 3812955 decimal digits
takes 5.174 GHz-days to do one PRP test
Last-known PrimeNet details:
Assigned as prp on 2022-09-30, 0.0% done, ETC 2022-10-04
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP0A859A949E632D22PRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2684.705864.7059%40000042845985014.05019.1780%18.755967.9452%3.2393%
PrimeNet2640.281062.5000%5500017000000.08574.2582%0.366764.0968%1.5968%
GPU722684.705864.7059%9000022000000.12143.0964%4.827265.7987%1.0928%
Difference---+310000+426259850+13.9287+6.0816%+13.9287+2.1465%+2.1465%

Known prime factors (2 factors, 141.6 bits, 0.00111768% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
126663612093293071785954952012167.5048263198371600
24 × 32 × 52 × 2295332881
2022-09-222522953328812.591174.069138.34
12666361197560513078040491834332374.065779862949895556
22 × 32 × 8753 × 21517 × 115021
2001-07-2921517115021422.090.01580.0259

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
12666361413552053284740707389557361071917632020503343141.569
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-04-04T08:45:39nordisweet16_30.8b13400000400000-
skipped known factor: 19756051307804049183433
--0.237--2.158%
2022-04-23T10:12:50nordisweet16_30.8b14400000428459850-
skipped known factor: 19756051307804049183433
--14.05--9.178%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-07-29T00:00:00ANONYMOUSv4_computers??74.06523120.010.53244.3
2000-03-27T00:00:00ANONYMOUSv4_computers21256--0.001--
2000-06-28T00:00:00ANONYMOUSv4_computers21264--0.281--
2022-09-25T06:23:19LordJuliusManual testing264265--0.295--
2022-09-25T06:23:19LordJuliusManual testing265266--0.590--
2022-09-25T06:23:19LordJuliusManual testing266267--1.180--
2022-09-22T09:42:49TJAOIManual testing267268*67.504210.24510.530.499
2022-09-25T06:23:19LordJuliusManual testing26726867.504210.24510.530.499


ECM factoring results:
No ECM results for M12666361


Lucas-Lehmer results:
No L-L results for M12666361


PRP results:
dateuseridcompidcofactorsres64PRP
2022-04-30T01:53:51XZT3050Micro1
19756051307804049183433
0A859A949E632D22no


P-1 factor-bounds graph:
B1 = 400000, B2 = 428459850 (P-1 stage 2)
B1 = 400000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
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109
1010
TF factor-bounds graph:
268
267
266
265
264
256
2
250
260
270
280
290
2100
Last modified: 2022-09-30T22:27:02+00:00