I quickly found the 59 because 883 - 3・196 = = 883 - 600 +12 = 5⨉59, but then I spazzed dividing it out, and erroneously concluded that it was an error. Then I slogged thru primes until 47⨉4189. (It's becoming infrequent that I am lucid enough to do this.) Then I cheated slightly by opening my eyes and asking Mathematica if 4189 was prime. False? Damn, that 59 was right after all! Coincidentally, the final factor, 71, is the algebraic degree of Conway's Constant, the asymptotic growth rate of the Look-Say Sequence <https://www.youtube.com/watch?v=ea7lJkEhytA>. Since JHC was a notorious mental factorer, he must have attacked 196883 as soon as it was revealed as the "dimension" of the Monster Group <https://www.youtube.com/watch?v=jsSeoGpiWsw>. (After his stroke, he admitted to Rich that he was down to 4-digit numbers.) —rwg In[1545]:= FiniteGroupData["Monster","Order"] Out[1545]= 808017424794512875886459904961710757005754368000000000 In[1546]:= FI@% Out[1546]= 2⁴⁶ 3²⁰ 5⁹ 7⁶ 11² 13³ 17 19 23 29 31 41 47 59 71