is 2 1974229 - 1
has 594303 decimal digits
takes 0.130 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L3907DAB6BA1CE366double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.050968.6567%1974229300000000.33386.6158%15.384770.7303%2.0736%
PrimeNet2580.019463.7931%80001400000.00142.4726%0.020964.6884%0.8953%
GPU722620.311266.1290%80001000000.00121.1964%0.312466.5343%0.4052%
Difference+5+14.7397+2.5277%+1966229+29900000+0.3326+5.4194%+15.0723+4.1961%+4.1961%

Known prime factors (1 factor, 78.1 bits, 0.00395726% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
19742293296732726846810563715292478.12583494182459248916
22 × 3 × 59 × 1201 × 98192869477
2018-02-0212019819286947740,109510.04952.61

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-03-18T23:33:00kurlyslice100000030000000---0.246--6.244%
2018-01-20T15:39:31Jocelyn Larouchelow 4M19742293000000012---0.334--6.616%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-12-27T00:00:00ANONYMOUSv4_computers21258--0.019--
2016-02-23T16:29:01Mark RoseManual testing258260--0.058--
2009-12-28T15:49:00S485122USB-W260261--0.078--
2016-02-23T16:29:01Mark RoseManual testing261262--0.156--
2011-08-27T22:19:00GrunwalderGIMPManual testing21263--0.808--
2016-02-23T16:29:01Mark RoseManual testing262263--0.497--
2015-03-19T08:30:00lycornManual testing263264--0.994--
2015-03-19T08:31:00lycornManual testing264265--1.893--
2015-09-10T08:47:00ramgeisManual testing265266--3.785--


ECM factoring results:

Old Calculation Method

Total ECM effort:3.294 GHz-days
Estimated T-Level:1.950
DigitsB1CurvesCompleteFacMiss
201100039 / 1000.39067.573%
255000039 / 2800.13986.976%

New Calculation Method

Total ECM effort:3.294 GHz-days
Estimated T-Level:1.950
DigitsB1CompleteFacMiss
20110001.25828.420%
25500000.11489.252%
302500000.00799.302%


ECM Summary

B1B2factorcurvesGHz-days
500005000000363.040
50000500000030.253


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-17T00:00:00ANONYMOUSv4_computers3907DAB6BA1CE3660.130
2015-07-12T18:10:00MadPooManual testing3907DAB6BA1CE3660.130


PRP results:
dateuseridcompidcofactorsres64PRP
2018-02-02T21:43:51MaximeGMSI_GS63VR
329673272684681056371529
721E982C959114__no
2018-02-07T12:25:20Oliver KruseGTX-2
329673272684681056371529
721E982C959114__no


P-1 factor-bounds graph:
B1 = 1974229, B2 = 30000000 (P-1 stage 2)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1974229 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2018-02-07T12:25:20+00:00