is 2 1745693 - 1
has 525506 decimal digits
takes 0.095 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LAE38E8A667B28EEDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.021368.6567%2475400866600000.55557.9493%17.576871.1483%2.4916%
PrimeNet2570.011063.1579%80001400000.00122.8012%0.012264.1899%1.0320%
GPU722610.176065.5738%80001100000.00111.4119%0.177066.0598%0.4861%
Difference+6+16.8453+3.0829%+2467400+86550000+0.5544+6.5373%+17.3998+5.0884%+5.0884%

Known prime factors (1 factor, 71.9 bits, 0.00412034% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
174569344937743001765198232732271.9281287103259329252
22 × 631 × 509945823823
2016-03-13631509945823823437.052,185.54,081.9

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-10T16:23:00Carsten Kossendeyleela950001543750---0.014--2.401%
2014-04-05T13:21:00Jocelyn LaroucheManual testing100000100000---0.008--0.887%
2014-05-06T10:53:00Jocelyn LaroucheManual testing136767136767---0.011--1.059%
2014-09-15T22:12:00ANONYMOUSManual testing173534173534---0.014--1.203%
2015-04-19T17:08:00mikrMSI247540086660000---0.556--7.949%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-02-02T00:00:00ANONYMOUSv4_computers21258--0.022--
2016-02-23T16:28:49Mark RoseManual testing258260--0.066--
2010-04-18T22:56:00Architects Cubedm1_fw260261--0.088--
2016-02-23T16:28:49Mark RoseManual testing261262--0.176--
2011-01-21T16:10:00GrunwalderGIMPManual testing21263--0.914--
2016-02-23T16:28:49Mark RoseManual testing262263--0.562--
2015-05-12T21:20:00snme2pm1Manual testing263264--1.125--
2015-05-12T21:20:00snme2pm1Manual testing264265--2.140--
2015-09-04T17:59:00ramgeisManual testing265266--4.281--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.453 GHz-days
Estimated T-Level:24.536
DigitsB1CurvesCompleteFacMiss
2011000254 / 1002.5407.786%
2550000254 / 2800.90740.302%

New Calculation Method

Total ECM effort:17.453 GHz-days
Estimated T-Level:24.536
DigitsB1CompleteFacMiss
20110008.1940.028%
25500000.74147.686%
302500000.04695.542%
3510000000.00299.791%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025317.38
50000500000010.069


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-28T00:00:00ANONYMOUSv4_computersAE38E8A667B28EED0.095
2015-06-27T00:56:00MadPooManual testingAE38E8A667B28EED0.095


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T05:25:27Oliver KruseGTX-1
4493774300176519823273
2EEA8BB19A2B79__no
2017-11-03T17:26:42kkmrkkblmbrbkc4.xlarge
4493774300176519823273
2EEA8BB19A2B79__no


P-1 factor-bounds graph:
B1 = 2475400, B2 = 86660000 (P-1 stage 2)
B1 = 2475400 (P-1 stage 1)
B1 = 95000, B2 = 1543750 (P-1 stage 2)
B1 = 173534 (P-1 stage 1)
B1 = 136767 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
101
102
103
104
105
106
107
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
267
266
265
264
263
262
261
260
258
257
250
260
270
280
290
2100
Last modified: 2020-07-27T11:05:31+00:00