is 2 390883 - 1
has 117668 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-L6A53352974A547F0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26776.017471.6418%6000000030000000003.095013.3705%79.112575.4334%3.7916%
PrimeNet2400.000052.5000%40001200000.000117.2520%0.000160.6947%8.1947%
GPU722440.000056.8182%70002000000.000212.8077%0.000362.3488%5.5306%
Difference+23+76.0174+14.8236%+59993000+2999800000+3.0948+0.5628%+79.1122+13.0846%+13.0846%

Known prime factors (1 factor, 100.3 bits, 0.02565389% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
390883153566047301837782291493745459131100.2771964347992901172247085365
3 × 5 × 11 × 113 × 3697 × 42201281 × 675275441
2017-01-19422012816752754414.281e+111.07811.2073

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-11-10T00:00:00ANONYMOUSv4_computers500001000000---0.001--1.446%
2002-06-15T00:00:00ANONYMOUSv4_computers327683276800---0.003--1.682%
2002-08-24T00:00:00ANONYMOUSv4_computers655366553600---0.006--2.399%
2012-07-07T13:43:00alpertronManual testing10000000200000000---0.286--8.599%
2017-01-19T16:27:33mikrS0526000000030000000001231100.2773.0950.0086.19013.370%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-01T00:00:00ANONYMOUSv4_computers252253--0.002--
2000-04-27T00:00:00ANONYMOUSv4_computers21254--0.006--
2022-03-07T06:43:13LordJuliusManual testing254255--0.006--
2001-03-05T00:00:00ANONYMOUSv4_computers21256--0.025--
2002-01-22T00:00:00ANONYMOUSv4_computers21257--0.049--
2004-01-18T00:00:00ANONYMOUSv4_computers21258--0.098--
2008-12-29T23:45:00Sturle Sundegimo.ifi258259--0.098--
2009-01-16T03:43:00Sturle Sundefoster.ifi259260--0.196--
2011-11-11T13:51:00lycornasteroid260261--0.393--
2015-08-13T13:31:00NRManual testing261262--0.786--
2015-11-18T00:42:15Gordon SpenceManual testing262263--2.511--
2015-11-18T00:42:15Gordon SpenceManual testing263264--5.023--


ECM factoring results:

Old Calculation Method

Total ECM effort:13.151 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:13.151 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
5000050000002802.946
2500002500000019410.21


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2016-06-01T06:39:36MadPooManual testing6A53352974A547F00.004


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-23T07:27:24Oliver KruseOllaptop
1535660473018377822914937454591
4B6D2906C8AB7A__no
2017-11-02T10:22:20kkmrkkblmbrbkc4.xlarge
1535660473018377822914937454591
4B6D2906C8AB7A__no
2020-04-18T15:34:49Oliver KruseAddPrpType5
1535660473018377822914937454591
6A8AB8339B6C70__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)
103
104
105
106
107
108
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
264
263
262
261
260
259
258
257
256
255
254
253
250
260
270
280
290
2100
2110
Last modified: 2022-03-07T06:43:13+00:00