is 2 1767937 - 1
has 532203 decimal digits
takes 0.096 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7D709BA0DA317BB9double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.807168.6567%2475400866600000.55557.9594%17.362671.1514%2.4947%
PrimeNet2570.010963.1579%80001400000.00122.8079%0.012164.1924%1.0345%
GPU722610.173865.5738%80001200000.00111.4540%0.174966.0743%0.5006%
Difference+6+16.6334+3.0829%+2467400+86540000+0.5544+6.5054%+17.1878+5.0771%+5.0771%

Known prime factors (1 factor, 74.0 bits, 0.00418746% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1767937193089349423413800898232374.0325460866236280303
43 × 18287 × 6944654083
2016-05-071828769446540833,355.229.76455.589

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:45:00Carsten Kossendeyleela950001615000---0.014--2.432%
2014-04-08T23:03:00Jocelyn LaroucheManual testing100000100000---0.008--0.889%
2014-05-09T20:31:00Jocelyn LaroucheManual testing136305136305---0.011--1.059%
2014-09-18T20:49:00Jocelyn LaroucheManual testing172610172610---0.014--1.202%
2015-05-09T06:06:00mikrMSI247540086660000---0.556--7.959%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.022--
2016-02-23T16:28:51Mark RoseManual testing258260--0.065--
2010-04-20T13:12:00Architects Cubedm1_f2260261--0.087--
2016-02-23T16:28:50Mark RoseManual testing261262--0.174--
2010-12-13T03:32:00GrunwalderGIMPManual testing21263--0.903--
2016-02-23T16:28:51Mark RoseManual testing262263--0.555--
2015-04-30T21:15:00snme2pm1Manual testing263264--1.111--
2015-04-30T21:15:00snme2pm1Manual testing264265--2.113--
2015-09-08T08:29:00ramgeisManual testing265266--4.227--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.270 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:17.270 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025017.20
50000500000010.069


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-06T00:00:00ANONYMOUSv4_computers7D709BA0DA317BB90.096
1999-03-01T00:00:00ANONYMOUSv4_computers7D709BA0DA317BB90.096
1999-03-15T00:00:00ANONYMOUSv4_computers7D709BA0DA317BB90.096
1999-03-26T00:00:00ANONYMOUSv4_computers7D709BA0DA317BB90.096
1999-04-02T00:00:00ANONYMOUSv4_computers7D709BA0DA317BB90.096
1999-04-13T00:00:00ANONYMOUSv4_computers7D709BA0DA317BB90.096
1999-04-23T00:00:00ANONYMOUSv4_computers7D709BA0DA317BB90.096
1999-05-09T00:00:00ANONYMOUSv4_computers7D709BA0DA317BB90.096
1999-05-16T00:00:00ANONYMOUSv4_computers7D709BA0DA317BB90.096
1999-05-23T00:00:00ANONYMOUSv4_computers7D709BA0DA317BB90.096
2015-07-18T19:04:00MadPooManual testing7D709BA0DA317BB90.096


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T11:14:01Oliver KruseGTX-1
19308934942341380089823
11A2EE662A9F8B__no
2017-11-04T07:40:31kkmrkkblmbrbkc4.xlarge
19308934942341380089823
11A2EE662A9F8B__no


P-1 factor-bounds graph:
B1 = 2475400, B2 = 86660000 (P-1 stage 2)
B1 = 2475400 (P-1 stage 1)
B1 = 95000, B2 = 1615000 (P-1 stage 2)
B1 = 172610 (P-1 stage 1)
B1 = 136305 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
103
104
105
106
107
103
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: 2020-09-04T07:41:05+00:00