Prefix 10^27

Until November 18, 2022, the standard SI prefix system only extended to yotta- = 10²⁴. As of Nov 18, 2022, ronna- was included in the official SI prefix for 10²⁷(octillion).^[1] Other names have been proposed as follows.

Prefix (10²⁷)	Symbol	Reciprocal (10^-27)	Symbol	Source
Ronna-	R	Ronto-	r	SI prefix^[1]
Nina-	N	Ninto-	n^{[note 1]}	By Jim Blowers^[2]
Xenna-	X	Xento-	x	By Sbiis Saibian^[3] , Jonathan Bowers^[4]
Novetta-	No	Novemo-	no	By Robert Munafo^[5]
Umpty-	U			In Sandcastle Builder^[6]
Xona-	X	Xonto-	x	In Blowers' old system^[7]
Xenna-		Xento-		By NumLynx^[8]
Xova-		Xovi-		By André Joyce^[9]
Nova-		Novo-		By Aarex Tiaokhiao^[10]
Bronta-	B	Brimto-	b	By Cookie Fonster^[11]
Harpi-	HA	Harpo-	ha^{[note 2]}	By Morgan Burke^[12] (after Harpo Marx)
Bronto-	B			By Lawrence Hollom, and very often on the Internet^[13]
Xina-	X	Xito-	x	In Aarex's old system^[14]
Xenta-	X	Xenno-	x	By Jeff K. Aronson^[15]
Nea-	N	Syto-	s^{[note 3]}	By Alex Lopez-Ortiz^[16]
Nova-	N	Novo-	n^{[note 1]}	By Gerard Michon^[17]
Xotta-		Xocto-		By H. Paul Shuch^[18]^[19]
Hella-	H			By Austin Sendek^[20]^[21]^[22] (from Northern California slang "hella")
Xenna-	X	Xono-		By Trakaplex^[23]
Xina		xovo		By MutiSoul^[24]
Xera-	X			In a Wikipedia-originated hoax notable for an appearance in the New York Times^[25]
Netta-	N	Nevo-	n^{[note 1]}	By XRQ CORPORATION^[26]
Ennala-		Ennuto-		By SeveralLegend9998^[27]

Approximation of prefix size[]

Notation	Approximation
Arrow notation	\(10\uparrow27\)
Bowers' Exploding Array Function	{10,27}
Bird's array notation	{10,27}
Chained arrow notation	\(10\rightarrow27\)
Hyper-E notation	\(E27\)
Scientific notation	\(10^{ 27 }\)

Notes[]

↑ ^1.0 ^1.1 ^1.2 Conflicts with the symbol for nano-
↑ Conflicts with the symbol for hectare, non-SI unit that is accepted for use with the SI
↑ Conflicts with the symbol for second

Sources[]

↑ ^1.0 ^1.1 Resolution 3 of the 27th CGPM (2022)
↑ Extension of SI prefix system by Jim Blowers
↑ SEPS
↑ Illion Numbers
↑ EMPS
↑ Sandcastle Builder
↑ Non-Canonical SI Prefixes
↑ SI prefixes. Retrieved 2021-12-08.
↑ André Joyce's Googology page
↑ [1]
↑ Pointless Large Number Stuff
↑ 2.2.3 - Non-Canonical SI Prefixes
↑ Extremely Big Numbers
↑ [2]
↑ Robert Munafo's SI Prefixes
↑ sci.math FAQ Names of Large Numbers
↑ Punch Lines - Funny Prefixes
↑ Unofficial SI Prefixes
↑ Shuch, H. Paul. The large and the small of it (Letter). Science News 143(14): 211, April 3, 1993
↑ The Official Petition to Establish Hella as the SI Prefix for 10^27
↑ Ryan Kim. Google gets behind 'hella' campaign 2010-05-24. Archived 2012-03-18.
↑ Google and Wolfram|Alpha examples
↑ https://trakaplex.wordpress.com/2021/02/01/extended-number-prefixes/ ^{[dead link]}
↑ Extended Si Prefix System 2.0 retrieved at UTC 4:50 on November 7th in 2021.
↑ Military Computer Sets Record - New York Times
↑ XRQ CORPORATION's Prefixes and Reciprocals
↑ SeveralLegend9998's New Googology Series (Retrieved 2024-06-17)

See also[]

Googological affixes

Suffixes: -teen · -ty · -plex · -illion · -yllion · -exian · -chime · -toll · -gong · -bong · -throng · -illiob
Prefixes: gar- · fz- · fuga- · megafuga- · booga- · trooga- · googo- · googolple-
SI prefixes: deca- · hecto- · kilo- · mega- · giga- · tera- · peta- · exa- · zetta- · yotta- · ronna- · quetta-
Non-SI prefixes: 1.001 · 1.01 · 1.1 · 1.5 · 2 · 3 · 666 · 10⁴ · 10⁵ · 10⁷ · 10⁸ · 10¹⁰ · 10¹¹ · 10¹³ · 10¹⁴ · 10¹⁶ · 10¹⁷ · 10¹⁹ · 10²⁰ · 10²² · 10²³ · 10²⁵ · 10²⁷ · 10²⁸ · 10²⁹ · 10³⁰ · 10³¹ · 10³² · 10³³ · 10³⁴ · 10³⁵ · 10³⁶ · 10³⁹ · 10⁴² · 10⁴⁵ · 10⁴⁸ · 10⁵¹ · 10⁵⁴ · 10⁵⁷ · 10⁶⁰ · 10⁶³ · 10⁶⁶ · 10⁶⁹ · 10⁷² · 10⁷⁵ · 10⁹⁰ · 10¹⁰⁰ · 10¹²⁰ · 10¹⁵⁰ · 10¹⁸⁰ · 10²¹⁰ · 10²⁴⁰ · 10²⁷⁰ · 10³⁰⁰ · 10⁶⁰⁰ · 10⁹⁰⁰ · 10¹²⁰⁰ · 10¹⁵⁰⁰ · 10¹⁸⁰⁰ · 10²¹⁰⁰ · 10²⁴⁰⁰ · 10²⁷⁰⁰ · 10³⁰⁰⁰ and higher

[conflict-2] 1.0 ^1.1 ^1.2 Conflicts with the symbol for nano-

[13] Conflicts with the symbol for hectare, non-SI unit that is accepted for use with the SI

[18] Conflicts with the symbol for second

[res3-1] 1.0 ^1.1 Resolution 3 of the 27th CGPM (2022)

[3] Extension of SI prefix system by Jim Blowers

[4] SEPS

[5] Illion Numbers

[6] EMPS

[7] Sandcastle Builder

[8] Non-Canonical SI Prefixes

[9] SI prefixes. Retrieved 2021-12-08.

[10] André Joyce's Googology page

[11] [1]

[12] Pointless Large Number Stuff

[14] 2.2.3 - Non-Canonical SI Prefixes

[15] Extremely Big Numbers

[16] [2]

[17] Robert Munafo's SI Prefixes

[19] sci.math FAQ Names of Large Numbers

[20] Punch Lines - Funny Prefixes

[21] Unofficial SI Prefixes

[22] Shuch, H. Paul. The large and the small of it (Letter). Science News 143(14): 211, April 3, 1993

[23] The Official Petition to Establish Hella as the SI Prefix for 10^27

[24] Ryan Kim. Google gets behind 'hella' campaign 2010-05-24. Archived 2012-03-18.

[25] Google and Wolfram|Alpha examples

[26] ttps://trakaplex.wordpress.com/2021/02/01/extended-number-prefixes/ ^{[dead link]}

[27] Extended Si Prefix System 2.0 retrieved at UTC 4:50 on November 7th in 2021.

[28] Military Computer Sets Record - New York Times

[29] XRQ CORPORATION's Prefixes and Reciprocals

[30] SeveralLegend9998's New Googology Series (Retrieved 2024-06-17)

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