is 2 3272147 - 1
has 985015 decimal digits
takes 0.344 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LC307C20156EB3B39double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26936.485868.1159%32721476374375705.76019.7324%42.245971.2190%3.1031%
PrimeNet2600.046963.3333%140002600000.00422.7742%0.051164.3505%1.0172%
GPU722641.087865.6250%170002800000.00481.6865%1.092566.2047%0.5797%
Difference+5+35.3980+2.4909%+3255147+637157570+5.7553+8.0458%+41.1533+5.0143%+5.0143%

Known prime factors (1 factor, 76.2 bits, 0.00232830% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3272147859267425450655426585672376.18613130024804060689
7 × 43 × 103 × 15511 × 27303733
2009-05-2415511273037337,703.00.22880.4231

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2020-12-25T20:19:27Jocelyn LaroucheManual testing109071109071---0.017--0.790%
2021-01-03T13:46:13Jocelyn LaroucheManual testing327214327214---0.050--1.417%
2021-01-17T00:34:25Jocelyn LaroucheManual testing32721432721476---0.074--3.060%
2021-07-13T11:23:32Jocelyn LaroucheManual testing32721473272147---0.498--3.485%
2021-12-19T14:34:26Jocelyn LaroucheManual testing3272147109008900-
skipped known factor: 85926742545065542658567
--1.376--7.611%
2021-12-22T09:19:40Jocelyn LaroucheManual testing3272147637437570-
skipped known factor: 85926742545065542658567
--5.760--9.732%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-04-02T04:52:00S485122USB-A260261--0.047--
2022-04-06T14:47:38LordJuliusManual testing21262--0.188--
2022-04-06T14:47:38LordJuliusManual testing262263--0.300--
2022-04-06T14:47:38LordJuliusManual testing263264--0.600--
2022-04-06T14:47:38LordJuliusManual testing264265--1.142--
2022-04-06T15:08:06LordJuliusManual testing265266--2.284--
2022-04-06T15:08:06LordJuliusManual testing266267--4.567--
2021-07-13T11:23:38Jocelyn LaroucheManual testing267268--9.135--
2022-01-09T20:46:12Jocelyn LaroucheManual testing268269--18.27--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CurvesCompleteFacMiss

New Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-04-05T00:00:00ANONYMOUSv4_computersC307C20156EB3B390.344


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-03T03:51:44Oliver KruseGTX-0
85926742545065542658567
3EB8F9CB2A0D7F__no
2017-12-14T03:33:38kkmrkkblmbrbkc4.xlarge
85926742545065542658567
3EB8F9CB2A0D7F__no


P-1 factor-bounds graph:
B1 = 3272147, B2 = 637437570 (P-1 stage 2)
B1 = 3272147, B2 = 109008900 (P-1 stage 2)
B1 = 3272147 (P-1 stage 1)
B1 = 327214, B2 = 3272147 (P-1 stage 2)
B1 = 327214 (P-1 stage 1)
B1 = 109071 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-06T15:08:06+00:00