is 2 1403807 - 1
has 422589 decimal digits
takes 0.054 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L2C36D6F7281E489Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26721.166768.6567 %2000000600000000.28577.2047 %21.452370.9149 %
Target2600.109465.0000 %60003500000.00141.2433 %0.110865.4352 %
Difference+7+21.0573+3.6567 %+1994000+59650000+0.2843+5.9613%+21.3416+5.4797 %

Known prime factors (1 factor, 89.6 bits, 0.00637951% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14038079100403988789819488602433692789.556324133017885999268012
22 × 11 × 19 × 257 × 271 × 5566914883861
2016-04-28271556691488386189,308,40916,79131,361

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-09-21Team Prime Ribv4_computers15000228750--0.0012.339%
2003-09-21Xyzzyv4_computers15000228750--0.0012.339%
2009-07-08markrlounge20000050000006--0.0307.164%
2010-07-04Rob_Deetwopc300000300000--0.0193.521%
2010-07-05Rob_Deetwopc400000400000--0.0263.913%
2010-07-06Rob_Deetwopc500000500000--0.0324.231%
2010-07-07Rob_Deetwopc600000600000--0.0394.500%
2010-07-08Rob_Deetwopc700000700000--0.0454.734%
2010-07-09Rob_Deetwopc800000800000--0.0524.941%
2010-07-10Rob_Deetwopc900000900000--0.0585.127%
2010-07-11Rob_Deetwopc10000001000000--0.0655.295%
2010-07-12Rob_Deetwopc11000001100000--0.0715.450%
2010-07-13Rob_Deetwopc12000001200000--0.0785.593%
2010-07-14Rob_Deetwopc13000001300000--0.0845.726%
2010-07-15Rob_Deetwopc14000001400000--0.0915.850%
2010-07-16Rob_Deetwopc15000001500000--0.0975.966%
2010-07-17Rob_Deetwopc16000001600000--0.1046.076%
2010-07-18Rob_Deetwopc17000001700000--0.1106.180%
2010-07-19Rob_Deetwopc18000001800000--0.1176.278%
2010-07-20Rob_Deetwopc19000001900000--0.1236.372%
2010-07-21Rob_Deetwopc20000002000000--0.1306.461%
2010-07-22Rob_Deetwopc21000002100000--0.1366.546%
2010-07-23Rob_Deetwopc22000002200000--0.1426.628%
2010-07-24Rob_Deetwopc23000002300000--0.1496.707%
2010-07-25Rob_Deetwopc24000002400000--0.1556.782%
2010-07-26Rob_Deetwopc25000002500000--0.1626.855%
2010-07-27Rob_Deetwopc26000002600000--0.1686.925%
2010-07-28Rob_Deetwopc27000002700000--0.1756.992%
2010-07-29Rob_Deetwopc28000002800000--0.1817.057%
2010-07-30Rob_Deetwopc29000002900000--0.1887.121%
2010-07-31Rob_Deetwopc30000003000000--0.1947.182%
2010-08-01Rob_Deetwopc31000003100000--0.2017.241%
2010-08-02Rob_Deetwopc32000003200000--0.2077.299%
2010-08-03Rob_Deetwopc33000003300000--0.2147.355%
2010-08-04Rob_Deetwopc34000003400000--0.2207.409%
2010-08-05Rob_Deetwopc35000003500000--0.2277.462%
2010-08-06Rob_Deetwopc36000003600000--0.2337.514%
2010-08-07Rob_Deetwopc37000003700000--0.2407.564%
2010-08-08Rob_Deetwopc38000003800000--0.2467.614%
2010-08-09Rob_Deetwopc39000003900000--0.2537.661%
2010-08-10Rob_Deetwopc40000004000000--0.2597.708%
2010-08-11Rob_Deetwopc41000004100000--0.2667.754%
2010-08-12Rob_Deetwopc42000004200000--0.2727.799%
2010-08-13Rob_Deetwopc43000004300000--0.2787.842%
2010-08-14Rob_Deetwopc44000004400000--0.2857.885%
2010-08-15Rob_Deetwopc45000004500000--0.2917.927%
2010-08-16Rob_Deetwopc46000004600000--0.2987.968%
2010-08-17Rob_Deetwopc47000004700000--0.3048.008%
2010-08-18Rob_Deetwopc48000004800000--0.3118.048%
2010-08-19Rob_Deetwopc49000004900000--0.3178.086%
2010-08-20Rob_Deetwopc50000005100000--0.3248.165%
2015-02-10alpertronManual testing5000001500000012--0.0849.411%
2015-05-18alpertronManual testing20000006000000012--0.33412.593%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-01-02ANONYMOUSv4_computers212560.007
1999-01-10ANONYMOUSv4_computers212560.007
2001-05-27Jossv4_computers212570.014
2003-07-13ANONYMOUSv4_computers212580.027
2016-02-23Mark RoseManual testing2582600.082
2009-02-22Sturle Sundefungo.ifi2602610.109
2016-02-23Mark RoseManual testing2612620.219
2011-04-05GrunwalderGIMPManual testing212631.137
2016-02-23Mark RoseManual testing2622630.699
2015-03-06snme2pm1Manual testing2632641.399
2015-03-06snme2pm1Manual testing2642652.662
2015-09-26ramgeisManual testing2652665.323


ECM factoring results:
Total ECM effort:30.259 GHz-days
Estimated T-Level:25.718
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.67418.740%
302500000.14486.623%
3510000000.01099.005%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024913.25
50000500000020.094
250000400000005016.92


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-07-19MadPooManual testing2C36D6F7281E489D0.063


PRP results:
dateuseridcompidcofactorsres64
2017-09-30Oliver KruseGTX-1
910040398878981948860243369
ED334373BA4D7556
2017-10-26kkmrkkblmbrbkc4.xlarge
910040398878981948860243369
ED334373BA4D7556


CERT results:
No CERT results for M1403807


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 5000000, B2 = 5100000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 4900000 (P-1 stage 1)
B1 = 4800000 (P-1 stage 1)
B1 = 4700000 (P-1 stage 1)
B1 = 4600000 (P-1 stage 1)
B1 = 4500000 (P-1 stage 1)
B1 = 4400000 (P-1 stage 1)
B1 = 4300000 (P-1 stage 1)
B1 = 4200000 (P-1 stage 1)
B1 = 4100000 (P-1 stage 1)
B1 = 4000000 (P-1 stage 1)
B1 = 3900000 (P-1 stage 1)
B1 = 3800000 (P-1 stage 1)
B1 = 3700000 (P-1 stage 1)
B1 = 3600000 (P-1 stage 1)
B1 = 3500000 (P-1 stage 1)
B1 = 3400000 (P-1 stage 1)
B1 = 3300000 (P-1 stage 1)
B1 = 3200000 (P-1 stage 1)
B1 = 3100000 (P-1 stage 1)
B1 = 3000000 (P-1 stage 1)
B1 = 2900000 (P-1 stage 1)
B1 = 2800000 (P-1 stage 1)
B1 = 2700000 (P-1 stage 1)
B1 = 2600000 (P-1 stage 1)
B1 = 2500000 (P-1 stage 1)
B1 = 2400000 (P-1 stage 1)
B1 = 2300000 (P-1 stage 1)
B1 = 2200000 (P-1 stage 1)
B1 = 2100000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 1900000 (P-1 stage 1)
B1 = 1800000 (P-1 stage 1)
B1 = 1700000 (P-1 stage 1)
B1 = 1600000 (P-1 stage 1)
B1 = 1500000 (P-1 stage 1)
B1 = 1400000 (P-1 stage 1)
B1 = 1300000 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 1200000 (P-1 stage 1)
B1 = 1100000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 900000 (P-1 stage 1)
B1 = 800000 (P-1 stage 1)
B1 = 700000 (P-1 stage 1)
B1 = 600000 (P-1 stage 1)
B1 = 500000 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 400000 (P-1 stage 1)
B1 = 300000 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 15000, B2 = 228750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
101
102
103
104
105
106
107
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
266
265
264
263
262
261
260
258
257
256
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
250
260
270
280
290
JSON version of this page
Last modified: 2024-02-09T03:30:02+00:00