143 (one hundred [and] forty-three) is the natural number following 142 and preceding 144. In mathematics 143 is the sum of seven consecutive primes (11 + 13 + 17 + 19 + 23 + 29 + 31). But this number is never the sum of an integer and its base 10 digits, making it a self number. It is also the product of a twin prime pair (11 × 13). Every positive integer is the sum of at most 143 seventh powers (see Waring's problem). 143 is the difference in the first exception to the pattern shown below:

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