> perl -MStorable -MDevel::Peek  -le "$v = 2**70; Dump($v); $f = Storable::freeze(\$v); Dump($v)"
SV = NV(0x47e370) at 0x47e388
  REFCNT = 1
  FLAGS = (NOK,pNOK)
  NV = 1.18059162071741e+21
SV = PVNV(0x30a3e8) at 0x47e388
  REFCNT = 1
  FLAGS = (NOK,pIOK,pNOK,IsUV)
  UV = 18446744073709551615
  NV = 1.18059162071741e+21
  PV = 0