 reserve n,i for Nat;
 reserve p for Prime;

theorem Ex1:
  1 in FreeGen p
proof
  for i being Prime st i divides 1 holds i <= p
  proof
    let i be Prime;
    assume i divides 1; then
    i = 1 by WSIERP_1:15;
    hence thesis by INT_2:def 4;
  end;
  hence thesis by FG,MOEBIUS1:22;
end;
