is 2 3979201 - 1
has 1197859 decimal digits
takes 0.496 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26814.979167.6471%5000001130976001.19997.0121%16.179069.9157%2.2686%
PrimeNet2610.077263.9344%160003200000.00592.7254%0.083164.9174%0.9829%
GPU722651.833566.1538%200003600000.00701.7018%1.840466.7298%0.5760%
Difference+3+13.1456+1.4932%+480000+112737600+1.1929+5.3103%+14.3385+3.1859%+3.1859%

Known prime factors (2 factors, 107.7 bits, 0.00270597% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
39792011107809558411236.68913920
25 × 3 × 5 × 29
-32322.331e-95.787e-61.178e-5
397920123400338592477736812492270.987294033131179824
24 × 3 × 6125690232913
2018-11-2616612569023291384.55660,357112,730

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
397920125923118762777242566000747872540933107.676
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-04-19T17:52:32Jocelyn LaroucheManual testing300000300000-
skipped known factor: 110780955841
--0.054--1.589%
2022-05-11T11:03:50Jocelyn LaroucheManual testing500000113097600-
skipped known factor: 110780955841
--1.200--7.012%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2022-02-25T17:23:57Jocelyn LaroucheManual testing267268--7.512--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.539 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.539 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.09790.776%
25500000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.539


Lucas-Lehmer results:
No L-L results for M3979201


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T19:12:51kkmrkkblmbrbkManual testing
110780955841
E4D29D94725223__no
2018-01-03T08:36:26Oliver KruseGTX-1
110780955841
E4D29D94725223__no
2018-11-28T22:36:11Oliver KruseGTX-0
110780955841
2340033859247773681249
38D744F70FF9CF__no
2018-11-29T11:38:58kkmrkkblmbrbkc5d.large
110780955841
2340033859247773681249
38D744F70FF9CF__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 113097600 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 300000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-05-11T11:03:50+00:00