ⓘ 131 (number)

131 (number)

ⓘ 131 (number)

131 is a Sophie Germain prime, an irregular prime, the second 3-digit palindromic prime, and also a permutable prime with 113 and 311. It can be expressed as the sum of three consecutive primes, 131 = 41 + 43 + 47. 131 is an Eisenstein prime with no imaginary part and real part of the form 3 n − 1 {\displaystyle 3n-1}. Because the next odd number, 133, is a semiprime, 131 is a Chen prime. 131 is an Ulam number.

131 is a full reptend prime in base 10 and also in base 2. The decimal expansion of 1/131 repeats the digits 007633587786259541984732824427480916030534351145038167938931 297709923664122137404580152671755725190839694656488549618320 6106870229 indefinitely.


1. In the military

  • USNS Mission Santa Barbara T-AO-131 was a Mission Buenaventura -class fleet oiler during World War II
  • USS General T. H. Bliss AP-131 was a United States Navy General G. O. Squier -class transport ship during World War II
  • USS Buchanan DD-131 was a United States Navy Wickes -class destroyer
  • USS Bandera APA-131 was a is a United States Navy Haskell -class attack transport ship during World War II
  • ZIL-131 is a 3.5-ton 6x6 army truck
  • Strike Fighter Squadron VFA-131 is a United States Navy F/A-18C Hornet fighter squadron stationed at Naval Air Station Oceana
  • Convair C-131 Samaritan was an American military transport produced from 1954 to 1956
  • USS Hammann DE-131 was a United States Navy Edsall -class destroyer escort during World War II
  • Tiger 131 is a German Tiger I heavy tank captured in Tunisia by the British 48th Royal Tank Regiment during World War II
  • USS Walter X. Young APD-131 was a ship of the United States Navy during World War II
  • USS Melucta AK-131 was a United States Navy Crater -class cargo ship during World War II

2. In transportation

  • London Buses route 131 is a Transport for London contracted bus route in London
  • The Fiat 131 Mirafiori small/medium family car produced from 1974 to 1984
  • STS-131 is a NASA Contingency Logistic Flight CLF of the Space Shuttle Atlantis planned for no earlier than February 2010

3. In other fields

131 is also:

  • 131 Vala is an inner Main belt asteroid
  • The year AD 131 or 131 BC
  • United States Citizenship and Immigration Services Form I-131 to apply for a travel document, reentry permit, refugee travel document or advance parole
  • 131 is the ID3v1 tag equivalent to Indie music
  • Iodine-131, or radioiodine, is a radioisotope of iodine for medical and pharmaceutical use
  • 131 is the medical emergency telephone number in Chile
  • 131 AH is a year in the Islamic calendar that corresponds to 748 – 749 CE.
  • Sonnet 131 by William Shakespeare
  • ACP-131 is the controlling publication for listing of Q codes and Z codes, as published by NATO Allied countries
  • A 131 may refer to: A 131 road England a road connecting Little Waltham and Sudbury A 131 motorway France a French motorway connecting the A13 and Le
  • Sonnet 131 is a sonnet written by William Shakespeare and was first published in a 1609 quarto edition titled Shakespeare s sonnets. It is a part of the
  • National Highway 131 is a national highway of India. Bihpur, Puraini, Udakishanganj, Madhepura, Singheswar Sthan, Pipra, Simrahi Bazar, Bhimnagar, Birpur
  • prime is a primeval number and a permutable prime with 131 and 311. 113 is a highly cototient number and a centered square number 355 113 approximates
  • consecutive primes 449 457 461, 131 137 139 149 151 157 163 167 173, and 101 103 107 109 113 127 131 137 139 149 151 1369
  • Flight testing of the LH. 131 prototypes failed to demonstrate advantage over the competition, so aspirations for the LH. 131 filling the fighter - trainer
  • The 131 st Bomb Wing is a unit of the Missouri Air National Guard, stationed at Whiteman Air Force Base, Knob Noster, Missouri. If activated to federal

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