is 2 1935677 - 1
has 582697 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-L3D7B00206C51F66Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.350768.6567%1000000300000000.20296.2307%15.553670.6096%1.9529%
PrimeNet2580.019863.7931%80001400000.00122.4632%0.021064.6850%0.8919%
GPU722620.317466.1290%8000900000.00101.1513%0.318466.5190%0.3900%
Difference+5+15.0333+2.5277%+992000+29910000+0.2020+5.0795%+15.2352+4.0906%+4.0906%

Known prime factors (1 factor, 72.1 bits, 0.00372661% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
193567751862349418808815664072272.1351339643685873439
495797 × 2702000387
2017-02-274957972702000387727.1211.61721.628

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-11-20T04:38:00kurlyManual testing100000030000000---0.203--6.231%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-12-21T00:00:00ANONYMOUSv4_computers21258--0.020--
2016-02-23T16:28:59Mark RoseManual testing258260--0.060--
2010-02-02T07:27:00S485122USB-W260261--0.079--
2016-02-23T16:28:59Mark RoseManual testing261262--0.159--
2011-08-27T22:21:00GrunwalderGIMPManual testing21263--0.825--
2016-02-23T16:28:59Mark RoseManual testing262263--0.507--
2015-05-13T22:18:00lycornManual testing263264--1.014--
2015-05-13T22:18:00lycornManual testing264265--1.930--
2015-09-04T17:59:00ramgeisManual testing265266--3.861--


ECM factoring results:

Old Calculation Method

Total ECM effort:19.325 GHz-days
Estimated T-Level:24.464
DigitsB1CurvesCompleteFacMiss
2011000250 / 1002.5008.106%
2550000250 / 2800.89340.883%

New Calculation Method

Total ECM effort:19.325 GHz-days
Estimated T-Level:24.464
DigitsB1CompleteFacMiss
20110008.5470.019%
25500000.77546.088%
302500000.04895.321%
3510000000.00299.780%


ECM Summary

B1B2factorcurvesGHz-days
500005000000302.085
50000500000030.209
50000660000021016.48
50000675000070.555


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-10T00:00:00ANONYMOUSv4_computers3D7B00206C51F66B0.105
2015-06-27T00:56:00MadPooManual testing3D7B00206C51F66B0.105


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T02:18:01Oliver KruseGTX-2
5186234941880881566407
9196FDED554C41__no
2017-11-11T04:49:59kkmrkkblmbrbkold
5186234941880881566407
9196FDED554C41__no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
104
105
106
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
266
265
264
263
262
261
260
258
250
260
270
280
290
2100
Last modified: 2022-03-10T10:41:20+00:00