Number 71

A page of the Numeropedia - the Special Encyclopedia of Numbers

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[Chemistry]  The atomic number of Lutetium (Lu). The last element in the Lanthanide series: Lanthanum (57) to Lutetium (71).

 

[History]  The age of U.S. Vice President Alben W. Barkley when he assumed the office in 1949, the oldest U.S. Vice President, under the 33rd U.S. President Harry S. Truman.

 

[Math.]  A right-truncatable prime number.

 

[Math.]  A sequence of prime numbers: 71, 701, 7001, 70001 and 700001.

 

[Math.]  An absolute prime number (or permutable prime number): both numbers 71 and 17 are prime or in fact, absolute prime.

 

[Math.]  A 7-term arithmetic progression of prime numbers, of common difference 2310: 71, 2381, 4691, 7001, 9311, 11621 and 13931.

 

[Math.]  713 = 357,911 = (3+57+9+1+1)3.

719 = 45,848,500,718,449,031 = (4+5+8+4+8+5+0+0+7+1+8+4+4+9+0+3+1)9.

 

[Math.]  Sum of prime numbers up to 71 is 639, which is divisible by 71.

 

[Math.]  A supersingular prime numbers factors of the order of the Monster group M: 246×320×59×76×112×133×17×19×23×29×31×41×47×59×71 = 808017424794512875886459904961710757005754368000000000.

 

[Sport]  The popular scores for an even par of an 18-hole round of a golf course are 70, 71 or 72.