what is the lowest credit score you can get a student loan with?

I have been trying to rebuild my credit but i am going to school and dont have neough money for my books so I wanted to get a small student loan to cover that and a few other expenses because my federal student loans are not available until feb. 16th which is the weekend after a month after school start. I am going to school for nursing so my text books are pricy. ohh and my score is in the mid to high 500s

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