is 21911919-1
has 575,545 decimal digits
takes 0.104 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-LDFB35CDE055700A4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.541468.6567%8,000,000320,000,0001.966510.4685%17.507979.1252%15.9673%
PrimeNet2570.010063.1579%9,000160,0000.00143.0415%0.011466.1994%3.0415%
GPU722610.160765.5738%10,000170,0000.00151.7601%0.162167.3338%1.7601%
Difference+6+15.3807+3.0829%+7,990,000+319,830,000+1.9650+8.7084%+17.3457+11.7914%+11.7914%

Known prime factors (1 factor, 129.2 bits, 0.00675821% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
191191978806222631270622425218210607635716831939129.212206091949060788198729177885170961
3 × 7 × 13 × 79 × 2441 × 15013 × 1070947 × 7768729 × 31341377
7,768,72931,341,3772017-12-097.646e+100.71211.2437

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-07-28T10:48:00kurlykurlytop1,000,00030,000,000---0.203--6.222%
2017-12-09T12:58:30mikrS0648,000,000320,000,0001239129.2121.9660.2073.93310.468%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-09T00:00:00ANONYMOUSv4_computers?258--0.020--
2016-02-23T16:28:57Mark RoseManual testing258260--0.060--
2009-05-28T19:24:00For Researchi4l_1260261--0.080--
2016-02-23T16:28:57Mark RoseManual testing261262--0.161--
2011-07-17T18:55:00GrunwalderGIMPManual testing21263--0.835--
2016-02-23T16:28:57Mark RoseManual testing262263--0.513--
2015-05-16T20:58:00snme2pm1Manual testing263264--1.027--
2015-05-16T20:58:00snme2pm1Manual testing264265--1.954--
2015-10-02T08:43:13ramgeisManual testing265266--3.909--
2017-03-15T08:26:29Smok_bmvManual testing266267--7.817--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
50,0005,000,000392.707


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21T00:00:00ANONYMOUSv4_computersDFB35CDE055700A40.104
2015-07-14T15:04:00MadPooManual testingDFB35CDE055700A40.104


PRP results:
dateuseridcompidcofactorsres64PRP
2017-12-10T01:36:34YarBerManual testing
788062226312706224252182106076357168319
72031EBCD8BEE1__no
2017-12-10T02:00:18YarBerManual testing
788062226312706224252182106076357168319
72031EBCD8BEE1__no
2017-12-11T06:49:29Oliver KruseGTX-2
788062226312706224252182106076357168319
72031EBCD8BEE1__no


P-1 factor-bounds graph:
B1 = 8,000,000, B2 = 320,000,000 (stage 2)
B1 = 8,000,000 (stage 1)
B1 = 1,000,000, B2 = 30,000,000 (stage 2)
B1 = 1,000,000 (stage 1)
105
106
107
105
106
107
108
109
TF factor-bounds graph:
267
266
265
264
263
262
261
260
258
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2017-12-11T06:49:29+00:00