38996
This theorem was first conjectured by Pierre de Fermat in 1637 in the margin of a copy of " Arithmetica " , where he claimed that he had a proof that was too large to fit in the margin .
 Pierre de Fermat
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Pierre de Fermat