Which of the following numbers are prime numbers?  $$\textasciitilde$$  $103$~ ~ ~ ~ ~ ~ ~ ~ ~$115$~ ~ ~ ~ ~ ~ ~ ~ ~$127$~ ~ ~ ~ ~ ~ ~ ~ ~$139$  $$\textasciitilde$$ 
Overseas Competition->Knowledge Point->Number Theory Modules->Prime and Composite Numbers
$115=5\times23$ 