61

61 (sixty-one) is a positive integer following 60 and preceding 62. Its ordinal form is written "sixty-first" or 61st.
== Properties ==
*61 is an .
*61 is the 9th .
*61 is equivalent to gagthree using the Gag- prefix.
== In googology ==
*Greek-based number-naming systems, 61 is associated with prefix "henhexaconta-", and with prefix "unsexaginti-" in Latin systems.
*It is one of the values of the weak Goodstein function: \(g(5)=61\).
*It is equal to gag-three with the gag prefix, since A(3,3) in the Ackermann function equals 61.
== In science ==
*There are 61 particles in the .Hermann Josef Scheuber, Standard Model Picture with 61 Elementary Particles, International Journal of Applied Mathematics and Theoretical Physics. Vol. 4, No. 2, 2018, pp. 42-49. 
*It is also the of the , the first one having no s with a longer than that of humans.
== Sources ==
Category:Numbers
Category:Class 1
Category:Numbers 0-99
Category:Numbers in science
Category:Numbers with 1 to 2 digits
Category:Prime numbers
Category:Gag-