No, 7 x 29 = 203, so it has more factors than just one and itself.
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203 is a composite number. Its factors are 1, 7, 29, and 203.
203 = 7 x 29
203 is an integer and so there is no way to write it as a mixed number. It may be written in fractional form as 203/1.
The number 203 and 205 have no common factors. 203 = 7 x 29 205 = 5 x 41
The factors of 1421 are 1, 7, 29, 49, 203, and 1421. The prime factors of 1421 are 7 and 29.