is 2 2630791 - 1
has 791948 decimal digits
takes 0.203 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA09BB45BB2748364double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26711.294767.1642%80000002500000002.372510.3991%13.667270.5788%3.4146%
PrimeNet2590.029262.7119%110002000000.00242.7007%0.031663.7189%1.0071%
GPU722630.606765.0794%130002000000.00261.5725%0.609365.6285%0.5491%
Difference+4+10.6880+2.0848%+7987000+249800000+2.3699+8.8266%+13.0579+4.9503%+4.9503%

Known prime factors (1 factor, 100.5 bits, 0.00382063% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2630791180871656357709720580132044958331100.513343759075422011327734001
19 × 1931 × 43717 × 1502591 × 142635347
2018-08-1215025911426353476.486e+101.02941.6255

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-31T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.295%
2003-11-08T00:00:00Team Prime Ribv4_computers15000217500---0.003--0.915%
2010-12-21T22:27:00Jocelyn LaroucheManual testing2000020000---0.002--0.318%
2010-12-26T02:29:00Jocelyn LaroucheManual testing3000030000---0.003--0.436%
2011-01-20T22:46:00Jocelyn LaroucheManual testing5000050000---0.006--0.624%
2011-03-05T03:20:00James Heinrichi7-9203000008000000---0.081--4.405%
2018-08-12T08:33:00mikrS07080000002500000001231100.5132.3730.4064.74510.399%
2019-07-04T12:46:38alpertronManual testing20000006000000012---0.578--7.687%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-26T00:00:00ANONYMOUSv4_computers21259--0.029--
2016-02-23T16:29:18Mark RoseManual testing259260--0.029--
2009-01-30T19:15:00Sturle Sundecelair.ifi260261--0.058--
2012-06-15T16:02:00Grant McCrackenthumper261262--0.117--
2013-01-14T11:57:00dbaughManual testing262263--0.373--
2015-02-23T17:25:00VictordeHollanderManual testing263264--0.746--
2015-02-23T17:25:00VictordeHollanderManual testing264265--1.420--
2016-01-19T09:40:25ramgeisManual testing265266--2.840--
2017-09-01T23:24:08Gordon SpenceManual testing266267--5.681--


ECM factoring results:

Old Calculation Method

Total ECM effort:3.095 GHz-days
Estimated T-Level:1.500
DigitsB1CurvesCompleteFacMiss
201100030 / 1000.30073.970%
255000030 / 2800.10789.823%

New Calculation Method

Total ECM effort:3.095 GHz-days
Estimated T-Level:1.500
DigitsB1CompleteFacMiss
20110000.96837.994%
25500000.08791.625%
302500000.00599.463%


ECM Summary

B1B2factorcurvesGHz-days
500005000000303.095


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-23T00:00:00ANONYMOUSv4_computersA09BB45BB27483640.203
2018-07-09T22:09:34kkmrkkblmbrbkoldA09BB45BB27483640.203


PRP results:
dateuseridcompidcofactorsres64PRP
2018-08-19T01:56:00Gabriel Lignelli6300
1808716563577097205801320449583
BBD0294A0CE2FB__no
2018-08-19T02:30:44ATHec2-PRPCFDC
1808716563577097205801320449583
BBD0294A0CE2FB__no


P-1 factor-bounds graph:
B1 = 8000000, B2 = 250000000 (P-1 stage 2)
B1 = 8000000 (P-1 stage 1)
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 300000, B2 = 8000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
266
265
264
263
262
261
260
259
250
260
270
280
290
2100
2110
Last modified: 2019-07-04T12:46:38+00:00