Fibonacci Numbers

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54122222371037658776676579571233761483351206693809497

87571595343018854458033386304178158174356588264390370

87571 595343 018854 458033 386304 178158 174356 588264 390370 = 2 x 5 x 61 x
1597 x 9521 x 6 376021 x 3415 914041 x 20 778644 396941 x 20 862774 425341

Number of divisors: 512

141693817714056513234709965875411919657707794958199867 This game is easy

Ooohh we're up to 54 digits now.....


229265413057075367692743352179590077832064383222590237

229265 413057 075367 692743 352179 590077 832064 383222 590237 = 5653 x
32971 978671 645905 645521 x 1230 026721 719313 471360 714649

Number of divisors: 8

370959230771131880927453318055001997489772178180790104

600224643828207248620196670234592075321836561403380341......Not listed in OEIS....

600224 643828 207248 620196 670234 592075 321836 561403 380341 = 13 x 73 x
149 x 1553 x 2221 x 404656 773793 x 3 041266 742295 771985 148799 223649

Number of divisors: 128

971183874599339129547649988289594072811608739584170445

1571408518427546378167846658524186148133445300987550786.....Also unlisted..

1 571408 518427 546378 167846 658524 186148 133445 300987 550786 = 2 x 17 x
173 x 2089 x 20357 x 36017 x 40193 x 322073 x 514229 x 3821 263937 x 6 857029 027549

Number of divisors: 2048

2542592393026885507715496646813780220945054040571721231

4114000911454431885883343305337966369078499341559272017

4 114000 911454 431885 883343 305337 966369 078499 341559 272017 = 4733 x
93629 x 9283 622964 639019 423529 121698 442566 463089 390281

Number of divisors: 8

6656593304481317393598839952151746590023553382130993248

10770594215935749279482183257489712959102052723690265265

10 770594 215935 749279 482183 257489 712959 102052 723690 265265 = 5 x 953 x
15901 x 55 945741 x 2 741218 753681 x 926 918599 457468 125920 827581

Number of divisors: 64

17427187520417066673081023209641459549125606105821258513

Aren't we supposed to be able to do these things in our heads as aspies - savant like? Or is that just a myth?

28197781736352815952563206467131172508227658829511523778

28 197781 736352 815952 563206 467131 172508 227658 829511 523778 = 2 x 1069
x 122 887425 153289 x 1665 088321 800481 x 64455 877349 703042 877309

Number of divisors: 32

I doubt Jerry Newport can crunch numbers this large...Shakuntala Devi was the bench mark for mental calculators

Last edited by richie on 17 Aug 2008, 10:47 am, edited 1 time in total.

45624969256769882625644229676772632057353264935332782291

73822750993122698578207436143903804565580923764844306069

73 822750 993122 698578 207436 143903 804565 580923 764844 306069 = 5381 x
2517 975182 669813 x 32170 944747 810641 x 169 360439 829648 789853

Number of divisors: 16


Factorization complete in 0d 0h 1m 31s********>>>>>>>>This one took a while to process....
ECM: 2185029 modular multiplications
Prime checking: 9413 modular multiplications
SIQS: 8212 polynomials sieved
11773 sets of trial divisions
1998 smooth congruences found (1 out of every 2896 values)
8995 partial congruences found (1 out of every 643 values)
1302 useful partial congruences