is 2 1730789 - 1
has 521020 decimal digits
takes 0.094 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LC33F1FFA7381B5D4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.167868.6567%36422001234567890.80008.6264%17.967871.3605%2.7038%
PrimeNet2570.011163.1579%80001400000.00122.7966%0.012364.1882%1.0303%
GPU722610.177565.5738%70001100000.00101.3455%0.178566.0370%0.4632%
Difference+6+16.9904+3.0829%+3635200+123346789+0.7990+7.2810%+17.7894+5.3236%+5.3236%

Known prime factors (2 factors, 165.4 bits, 0.00955665% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17307891831092713695972985241672477.27752897629742735047
3 × 129763 × 135882672623
2020-05-1812976313588267262324,908582.371,087.7
17307893383097377914092553581038092788.12897732807925001041536
27 × 1297 × 3559 × 12541 × 13189559
2015-09-15125411318955939,636,0820.05750.1056

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
17307896194764958422446396339938112977004436319928125210350165.406
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-09T16:50:00Carsten Kossendeyleela900001530000---0.013--2.367%
2014-04-04T00:13:00Jocelyn LaroucheManual testing100000100000---0.008--0.886%
2014-05-04T19:08:00Jocelyn LaroucheManual testing137084137084---0.011--1.059%
2014-09-10T00:51:00Jocelyn LaroucheManual testing174168174168---0.014--1.203%
2014-12-02T21:55:00Jocelyn LaroucheManual testing211252211252---0.017--1.328%
2015-01-27T21:58:00Jocelyn LaroucheManual testing255614255614---0.020--1.459%
2015-01-29T22:02:00Jocelyn LaroucheManual testing281175281175---0.022--1.527%
2015-02-06T22:00:00Jocelyn LaroucheManual testing562350562350---0.044--2.079%
2015-03-29T20:50:00Jocelyn LaroucheManual testing618585618585---0.049--2.162%
2015-04-08T16:59:00Jocelyn LaroucheManual testing680443680443---0.054--2.248%
2015-05-01T17:21:00Jocelyn LaroucheManual testing823335823335---0.065--2.424%
2015-05-22T00:28:00Jocelyn LaroucheManual testing905668905668---0.071--2.515%
2015-06-08T13:42:00Jocelyn LaroucheManual testing996234996234---0.078--2.608%
2015-06-25T21:14:00Jocelyn LaroucheManual testing10958571095857---0.086--2.702%
2015-07-07T18:13:00Jocelyn LaroucheManual testing12054421205442---0.095--2.799%
2015-07-13T12:24:00Jocelyn LaroucheManual testing13259861325986---0.104--2.897%
2015-07-21T01:20:00Jocelyn LaroucheManual testing14585841458584---0.115--2.997%
2015-07-31T12:12:00Jocelyn LaroucheManual testing16044421604442---0.126--3.099%
2015-09-15T01:38:00mikrMSI3642200123456789122788.1280.8000.1881.6008.626%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-02-02T00:00:00ANONYMOUSv4_computers21258--0.022--
2010-04-22T12:47:00Architects Cubedm1_f2260261--0.089--
2010-11-18T02:51:00GrunwalderGIMPManual testing21263--0.922--
2015-05-04T17:37:00snme2pm1Manual testing263264--1.134--
2015-05-04T17:37:00snme2pm1Manual testing264265--2.159--
2015-09-02T13:37:00ramgeisManual testing265266--4.318--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.231 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:17.231 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000020113.80
500005000000503.432


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-06T00:00:00ANONYMOUSv4_computersC33F1FFA7381B5D40.094
2015-07-10T01:01:00MadPooManual testingC33F1FFA7381B5D40.094


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:28:28alpertronManual testing
338309737791409255358103809
B4897EF60B0D1E__no
2017-10-19T08:24:19Oliver KruseGTX-0
338309737791409255358103809
B4897EF60B0D1E__no
2020-05-18T23:39:38CrypticCluecruncher
183109271369597298524167
338309737791409255358103809
35BC1A581FB0DF__no
2020-05-19T20:50:58marssystemssystem03
183109271369597298524167
338309737791409255358103809
35BC1A581FB0DFC2no


P-1 factor-bounds graph:
B1 = 3642200, B2 = 123456789 (P-1 stage 2)
B1 = 3642200 (P-1 stage 1)
B1 = 1604442 (P-1 stage 1)
B1 = 1458584 (P-1 stage 1)
B1 = 1325986 (P-1 stage 1)
B1 = 1205442 (P-1 stage 1)
B1 = 1095857 (P-1 stage 1)
B1 = 996234 (P-1 stage 1)
B1 = 905668 (P-1 stage 1)
B1 = 823335 (P-1 stage 1)
B1 = 680443 (P-1 stage 1)
B1 = 618585 (P-1 stage 1)
B1 = 562350 (P-1 stage 1)
B1 = 281175 (P-1 stage 1)
B1 = 255614 (P-1 stage 1)
B1 = 211252 (P-1 stage 1)
B1 = 174168 (P-1 stage 1)
B1 = 90000, B2 = 1530000 (P-1 stage 2)
B1 = 137084 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2020-05-19T20:50:58+00:00