***   at top-level: issquarefree(4294967
  ***                 ^--------------------
  *** issquarefree: the PARI stack overflows !
  current stack size: 20000000 (19.073 Mbytes)
  [hint] you can increase GP stack with allocatemem()

  ***   Break loop: type 'break' to go back to GP prompt

I do not encounter the same problem on [2, 5, 4, "git-52bd53b"] running on 64-bit Linux. I don't yet know if this is a regression, a Windows-specific bug, or an architecture issue. I suspect it's the last since 4294967298 = 2^32 + 2. Possibly of note is its form, 6p with p = 715827883 prime.

Charles Greathouse
Analyst/Programmer
Case Western Reserve University