frexpto always be non-expression template generating, see: 10993.
cpp_intthat results in incorrect sign of
cpp_intwhen both arguments are small enough to fit in a
double_limb_type. See 8126.
cpp_intthat results in incorrect value when the result should have a 0 in the last limb: 8133.
cpp_intwhere division of 0 by something doesn't get zero in the result: 8160.
a = pow(a, b). See 8326.
cpp_intthat gives incorrect answer for 0%N for large N: 8670.
numberto use enumerated values rather than true/false.
cpp_int_backendbased on review comments with new template parameter structure.
mpfr_float_backendto allow stack-based allocation.