is 2 1923073 - 1
has 578903 decimal digits
takes 0.104 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LDCD4A50670DD7488double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.451368.6567%1000000300000000.20296.2262%15.654270.6082%1.9515%
PrimeNet2570.010063.1579%90001700000.00143.0937%0.011464.2977%1.1398%
GPU722610.159765.5738%100001700000.00151.7621%0.161266.1804%0.6066%
Difference+6+15.2915+3.0829%+990000+29830000+0.2015+4.4641%+15.4930+4.4278%+4.4278%

Known prime factors (1 factor, 74.8 bits, 0.00388988% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1923073330064810033958545593612374.8058581702567556160
26 × 32 × 5 × 7 × 425679690851
2017-02-13644256796908513,798.11,824.43,407.4

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-09-27T05:48:00kurlyhex100000030000000---0.203--6.226%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-12-16T00:00:00ANONYMOUSv4_computers21258--0.020--
2016-02-23T16:28:58Mark RoseManual testing258260--0.060--
2009-06-04T13:34:00Architects Cubedi4l_1260261--0.080--
2016-02-23T16:28:58Mark RoseManual testing261262--0.160--
2011-08-27T22:20:00GrunwalderGIMPManual testing21263--0.830--
2016-02-23T16:28:58Mark RoseManual testing262263--0.510--
2015-05-17T10:45:00snme2pm1Manual testing263264--1.021--
2015-05-17T10:45:00snme2pm1Manual testing264265--1.943--
2015-09-03T11:06:00ramgeisManual testing265266--3.886--


ECM factoring results:

Old Calculation Method

Total ECM effort:19.317 GHz-days
Estimated T-Level:24.464
DigitsB1CurvesCompleteFacMiss
2011000250 / 1002.5008.106%
2550000250 / 2800.89340.883%

New Calculation Method

Total ECM effort:19.317 GHz-days
Estimated T-Level:24.464
DigitsB1CompleteFacMiss
20110008.5490.019%
25500000.77546.079%
302500000.04895.319%
3510000000.00299.780%


ECM Summary

B1B2factorcurvesGHz-days
500005000000302.084
50000500000020.139
50000660000021116.54
50000675000070.555


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21T00:00:00ANONYMOUSv4_computersDCD4A50670DD74880.104
2015-06-28T05:06:00MadPooManual testingDCD4A50670DD74880.104


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T23:02:55Oliver KruseGTX-3
33006481003395854559361
7F074C1B3B8F19__no
2017-11-10T07:49:59kkmrkkblmbrbkold
33006481003395854559361
7F074C1B3B8F19__no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
100
101
102
103
104
105
106
100
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
250
260
270
280
290
2100
Last modified: 2022-02-03T11:49:00+00:00