500
Athene goes to Poseidon and says, "I know you are angry with me Uncle, for helping Ulysses. But now I wish to make it up to you. See, down there is a ship from Ithaca. No doubt it holds friends of Ulysses, sailing out to meet their king. Why not do them a mischief?
What happens next?
Poseidon actually saves Telemachus's life by putting a thick cloud around the "Suitor's ships." Therefore, the suitors could not attack Telemachus and kill him.