is 2 1207757 - 1
has 363572 decimal digits
takes 0.037 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L2D82BB93B8E8B3D2double-checked
PRPD8250A772C7206BFPRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26849.351769.1176%28000000143500330050348.830718.6412%398.182474.8745%5.7569%
PrimeNet2560.007962.5000%5000800000.00042.2730%0.008463.3524%0.8524%
GPU722600.127265.0000%5000300000.00030.8270%0.127565.2894%0.2894%
Difference+8+49.2245+4.1176%+27995000+143500300050+348.8304+17.8143%+398.0550+9.5851%+5.4674%

Known prime factors (1 factor, 129.5 bits, 0.01072005% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
120775794410290263989402254404079926533733355939129.472390849691883339952715670784464647
7 × 7187 × 102481 × 884417 × 1159007 × 73956711797
2022-06-011159007739567117971.450e+11179.22334.64

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-08-24T00:00:00Jocelyn Larouchev4_computers10001000---4.44667e-5--0.004%
2002-10-12T00:00:00Jocelyn Larouchev4_computers50005000---0.000--0.053%
2002-11-09T00:00:00Jocelyn Larouchev4_computers80008000---0.000--0.091%
2002-11-16T00:00:00Jocelyn Larouchev4_computers1000010000---0.000--0.115%
2003-02-09T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.190%
2003-02-16T00:00:00ANONYMOUSv4_computers4096409600---0.001--0.399%
2003-09-21T00:00:00ANONYMOUSv4_computers100001000000---0.003--0.845%
2014-04-19T13:01:00Jocelyn LaroucheManual testing200000200000---0.009--1.065%
2014-09-18T20:49:00Jocelyn LaroucheManual testing253143253143---0.011--1.204%
2014-12-28T21:16:00mikrMSI4218475156083565---0.556--8.060%
2022-06-01T06:56:29Sid & AndySpeck2800000014350033005039129.472348.80.074697.718.641%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-10T00:00:00ANONYMOUSv4_computers21257--0.016--
2003-02-16T00:00:00ANONYMOUSv4_computers21258--0.032--
2003-03-16T00:00:00ANONYMOUSv4_computers21259--0.064--
2016-02-23T16:28:24Mark RoseManual testing259260--0.064--
2009-04-14T19:39:00Sturle Sundedietrich.ifi260261--0.127--
2011-05-09T14:45:00XyzzyManual testing261262--0.254--
2012-10-11T11:55:00dbaughManual testing262263--0.813--
2015-03-26T17:28:00omylistManual testing263264--1.626--
2015-03-27T13:48:00lycornManual testing264265--3.094--
2015-09-15T08:33:00ramgeisManual testing265266--6.187--
2018-07-06T11:18:15ramgeisManual testing266267--12.37--
2018-07-06T11:18:15ramgeisManual testing267268--24.75--


ECM factoring results:
Total ECM effort:31.041 GHz-days
Estimated T-Level:26.186
DigitsB1CompleteFacMiss
201100020.9900.000%
25500002.5777.597%
302500000.23778.879%
3510000000.01898.245%
4030000000.00199.889%


ECM Summary

B1B2factorcurvesGHz-days
50000500000028110.37
2500002500000011220.67


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-12T05:15:59MadPooManual testing2D82BB93B8E8B3D20.037


PRP results:
dateuseridcompidcofactorsres64PRP
2022-06-02T04:50:49LordJuliusWhiteBox
944102902639894022544040799265337333559
D8250A772C7206BFno


P-1 factor-bounds graph:
B1 = 28000000, B2 = 143500330050 (P-1 stage 2)
B1 = 28000000 (P-1 stage 1)
B1 = 4218475, B2 = 156083565 (P-1 stage 2)
B1 = 4218475 (P-1 stage 1)
B1 = 253143 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 10000, B2 = 1000000 (P-1 stage 2)
B1 = 4096, B2 = 409600 (P-1 stage 2)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 8000 (P-1 stage 1)
B1 = 5000 (P-1 stage 1)
B1 = 4096 (P-1 stage 1)
B1 = 2048 (P-1 stage 1)
B1 = 1000 (P-1 stage 1)
102
103
104
105
106
107
108
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
259
258
257
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2022-06-02T04:50:49+00:00