is 2 382867 - 1
has 115255 decimal digits
takes 0.004 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L3FC58C1CE1C5DCDBdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26777.609071.6418%6000000030000000003.095013.3508%80.704075.4279%3.7861%
PrimeNet2400.000052.5000%40001200000.000117.2071%0.000160.6734%8.1734%
GPU722440.000056.8182%70002000000.000212.7722%0.000362.3335%5.5153%
Difference+23+77.6090+14.8236%+59993000+2999800000+3.0948+0.5786%+80.7038+13.0944%+13.0944%

Known prime factors (1 factor, 89.1 bits, 0.02327115% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3828676622700767529821062659542332789.098864882683481446698548
22 × 3 × 883 × 53393887 × 1528705099
2016-12-22533938871528705099492,458,5181.88042.1867

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%
2012-07-27T11:35:00alpertronManual testing10000000200000000---0.286--8.583%
2016-12-22T17:53:16mikrS058600000003000000000122789.0983.0950.0076.19013.351%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-07-06T03:32:58George WoltmanManual testing30000000306000000027--2.527


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
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--
2009-01-05T22:40:00Sturle Sundefungo.ifi258259--0.100--
2009-01-09T18:32:00Sturle Sundeghini.ifi259260--0.201--
2011-11-16T00:40:00lycornasteroid260261--0.401--
2015-08-13T13:31:00NRManual testing261262--0.802--
2015-11-23T18:13:49Gordon SpenceManual testing262263--2.564--
2015-11-23T18:13:49Gordon SpenceManual testing263264--5.128--


ECM factoring results:

Old Calculation Method

Total ECM effort:13.137 GHz-days
Estimated T-Level:26.516
DigitsB1CurvesCompleteFacMiss
2011000474 / 1004.7400.853%
2550000474 / 2801.69318.344%
30250000194 / 6400.30373.833%

New Calculation Method

Total ECM effort:13.137 GHz-days
Estimated T-Level:26.516
DigitsB1CompleteFacMiss
201100025.1990.000%
25500003.1544.269%
302500000.30373.894%
3510000000.02397.698%
4030000000.00199.851%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002802.943
2500002500000019410.19


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2016-06-01T06:39:36MadPooManual testing3FC58C1CE1C5DCDB0.004


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-23T06:04:37Oliver KruseOllaptop
662270076752982106265954233
B9E7CDCCAAAC75__no
2017-11-02T11:16:00kkmrkkblmbrbkc4.xlarge
662270076752982106265954233
B9E7CDCCAAAC75__no
2020-04-18T15:25:56Oliver KruseAddPrpType5
662270076752982106265954233
4CDB381E668DCC__no


P-1 factor-bounds graph:
B1 = 60000000, B2 = 3000000000 (P-1 stage 2)
B1 = 60000000 (P-1 stage 1)
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (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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1010
TF factor-bounds graph:
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262
261
260
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2100
Last modified: 2022-03-07T06:37:23+00:00