is 2 1930823 - 1
has 581236 decimal digits
takes 0.105 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L6F708EB03533E8CFdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26830.870269.1176%80000003200000001.96659.7445%32.836672.1270%3.0093%
PrimeNet2580.019963.7931%80001400000.00122.4620%0.021164.6845%0.8914%
GPU722620.318266.1290%8000900000.00101.1507%0.319266.5188%0.3897%
Difference+6+30.5520+2.9886%+7992000+319910000+1.9655+8.5938%+32.5175+5.6082%+5.6082%

Known prime factors (1 factor, 73.4 bits, 0.00380105% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1930823123894041825832062246872373.3923208322094408241
41 × 78251758400201
2020-01-2041782517584002011,660.0335,367626,373

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-09-06T02:49:00kurlyhex100000030000000---0.203--5.689%
2018-01-18T21:26:34Jocelyn Larouchelow 4M19308233000000012---0.272--6.038%
2018-01-28T11:00:46mikrS061800000032000000012---1.966--9.744%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-12-21T00:00:00ANONYMOUSv4_computers21258--0.020--
2016-02-23T16:28:58Mark RoseManual testing258260--0.060--
2010-02-06T19:45:00S485122USB-W260261--0.080--
2016-02-23T16:28:58Mark RoseManual testing261262--0.159--
2011-08-27T22:21:00GrunwalderGIMPManual testing21263--0.827--
2016-02-23T16:28:58Mark RoseManual testing262263--0.508--
2015-05-18T08:20:00omylistManual testing263264--1.017--
2015-05-18T08:20:00omylistManual testing264265--1.935--
2015-09-04T17:59:00ramgeisManual testing265266--3.870--
2018-02-26T10:32:50TJAOIManual testing266267--7.740--
2019-05-09T12:32:10chuenkitManual testing267268--15.48--


ECM factoring results:

Old Calculation Method

Total ECM effort:19.928 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:19.928 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.7120.016%
25500000.77646.019%
302500000.04895.307%
3510000000.00299.779%


ECM Summary

B1B2factorcurvesGHz-days
500005000000725.004
50000500000010.069
50000750000017814.85


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-10T00:00:00ANONYMOUSv4_computers6F708EB03533E8CF0.105
2015-07-14T15:04:00MadPooManual testing6F708EB03533E8CF0.105


PRP results:
dateuseridcompidcofactorsres64PRP
2020-01-20T16:48:52mrhx
12389404182583206224687
E8244D1137F13011no
2020-01-30T20:08:00krackerGRID-11
12389404182583206224687
E8244D1137F13011no


P-1 factor-bounds graph:
B1 = 8000000, B2 = 320000000 (P-1 stage 2)
B1 = 8000000 (P-1 stage 1)
B1 = 1930823, B2 = 30000000 (P-1 stage 2)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1930823 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-07T09:50:22+00:00