On 2019-05-27 05:42, Hans Havermann wrote:
SP: "type Prime[8200000000] or Prime[93000000000]"
note the eight zeros after 82, nine zeros after 93
OOPS! See below.
RWG: "My old Macsyma gets (c71) PRIME(8200000000); (d71) 205021987301 (c72) PRIME(9300000000); (d72) 233746743437"
note only eight zeros after 93
VM: "I think that macsyma is wrong about 93*10^9: ./primecount -n 93000000000 2560462462787 ./primecount 2560462462786 92999999999"
RWG: "? It agrees with (somewhat cajoled) Mathematica: In[159]:= NextPrime@Prime[9299999999] Out[159]= 233746743437"
:)
In[456]:= Prime[93 10^9] // tim During evaluation of In[456]:= 36292.726051,0 (ten hrs +. Clearly unintended. Yet correct.) Out[456]= 2560462462787 —rwg