is 2 382763 - 1
has 115224 decimal digits
takes 0.004 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
Actual26777.630171.6418%1500000013650000001.244811.4206%78.874874.8805%3.2387%
PrimeNet2400.000052.5000%40001200000.000117.2065%0.000160.6731%8.1731%
GPU722440.000056.8182%70002000000.000212.7718%0.000362.3333%5.5151%
Difference+23+77.6301+14.8236%+14993000+1364800000+1.2445-1.3512%+78.8746+12.5472%+12.5472%

Known prime factors (1 factor, 61.3 bits, 0.01601761% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
38276328575731192086579031961.3093732823077477
3 × 13 × 95713412243
2007-12-3113957134122430.875073.303136.91

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-11-10T00:00:00ANONYMOUSv4_computers500001000000---0.001--1.440%
2002-06-15T00:00:00ANONYMOUSv4_computers327683276800---0.003--1.676%
2002-08-24T00:00:00ANONYMOUSv4_computers655366553600---0.006--2.391%
2021-07-06T03:32:53George WoltmanManual testing150000001365000000---1.245--11.421%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-07-06T03:32:54George WoltmanManual testing750000059250000027--0.520


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-11-18T00:00:00Sturle Sundev4_computers??61.309190.0720.0080.151
1999-12-01T00:00:00ANONYMOUSv4_computers252253--0.002--
2000-04-27T00:00:00ANONYMOUSv4_computers21254--0.006--
2022-03-07T06:37:23LordJuliusManual testing254255--0.006--
2001-03-17T00:00:00ANONYMOUSv4_computers21256--0.025--
2002-01-28T00:00:00ANONYMOUSv4_computers21257--0.050--
2004-01-18T00:00:00ANONYMOUSv4_computers21258--0.100--


ECM factoring results:

Old Calculation Method

Total ECM effort:10.499 GHz-days
Estimated T-Level:26.125
DigitsB1CurvesCompleteFacMiss
2011000423 / 1004.2301.425%
2550000423 / 2801.51122.016%
30250000144 / 6400.22579.838%

New Calculation Method

Total ECM effort:10.499 GHz-days
Estimated T-Level:26.125
DigitsB1CompleteFacMiss
201100023.8220.000%
25500003.0214.875%
302500000.28775.083%
3510000000.02297.834%
4030000000.00199.860%


ECM Summary

B1B2factorcurvesGHz-days
20.00000e+0
5000050000002792.932
250000250000001447.567


Lucas-Lehmer results:
No L-L results for M382763


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-23T06:15:26Oliver KruseDoppelherz
2857573119208657903
AAF8454F8A8D25__no
2017-09-24T17:46:29Oliver KruseManual testing
2857573119208657903
AAF8454F8A8D25__no
2017-11-07T01:12:46kkmrkkblmbrbkc4.xlarge
2857573119208657903
AAF8454F8A8D25__no
2020-04-18T08:59:05Oliver KruseAddPrpType5
2857573119208657903
F7CDF6BACD24AE__no


P-1 factor-bounds graph:
B1 = 15000000, B2 = 1365000000 (P-1 stage 2)
B1 = 15000000 (P-1 stage 1)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 50000, B2 = 1000000 (P-1 stage 2)
B1 = 65536 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-03-07T06:37:23+00:00