1 (Roman numeral:I) (TV:The Man from MI.5^[+]Loading...["The Man from MI.5 (TV story)"],The Church on Ruby Road^[+]Loading...["The Church on Ruby Road (TV story)"]) was aprime number. (AUDIO:The Haunting^[+]Loading...["The Haunting (audio story)"])

According to theTenth Doctor, "any number that reduce[d] to 1 when you [took] thesum of thesquare of itsdigits and continue[d] iterating it until it yield[ed] 1" was ahappy number. (TV:42^[+]Loading...["42 (TV story)"])

Part of thedemonstration made by theTwelfth Doctor. (TV:The Pilot^[+]Loading...["The Pilot (TV story)"])

TheTwelfth Doctor onceproved that${\displaystyle \underset{\theta \to 0}{lim}\frac{sin\theta }{\theta }=1}$. (TV:The Pilot^[+]Loading...["The Pilot (TV story)"])

Block Transfer Computation made use of 1s and0s, as it was written inbinary. (AUDIO:The Enchantress of Numbers^[+]Loading...["The Enchantress of Numbers (audio story)"])

According to theSecond Doctor, a one in13 chance was about7.6923percent,odds he didn't like. (COMIC:Card Conundrum^[+]Loading...["Card Conundrum (comic story)"])

TheFourth Doctor describedStreetsDoctor Who Ice Cream as "the firstDoctor Whoicetreat. (TV:Streets Doctor Who advertisement^[+]Loading...["Streets Doctor Who advertisement (TV story)"])

TheTenth Doctor believed thatDalek Caan, who had emerged as the last of theCult of Skaro, was the one remainingDalek in "the whole universe". (TV:Evolution of the Daleks^[+]Loading...["Evolution of the Daleks (TV story)"])

The Twelfth Doctor once toldBill that "elevenplustwo" was ananagram of "twelve plus one", to which Bill responded that both of these were equal to13. (COMIC:Harvest of the Daleks^[+]Loading...["Harvest of the Daleks (comic story)"])

British Summertime began in early2005 on aSundaymorning at 01:00am whenthe clocks went forwards. (PROSE:The Clocks Go Forward^[+]Loading...["The Clocks Go Forward (short story)"])

Thecountdown towards theNinth Doctor'seviction onBig Brothercounted from6 to 0, going through5,4,3,2, and 1. (TV:Bad Wolf^[+]Loading...["Bad Wolf (TV story)"])

TheThirteenth Doctor holds up 1finger in reference to thenumber, '1'. (WC:Message from the Doctor^[+]Loading...["Message from the Doctor (webcast)"])

In anemergency transmission sent bythe TARDIS, theThirteenth Doctor listed 5 things that she did in any worryingsituation. The first wasremembering that she would get through the situation, and thatdarkness never prevailed. (WC:Message from the Doctor^[+]Loading...["Message from the Doctor (webcast)"])

Panda: "Oneday..." (WC:Untitled 2^[+]Loading...{"timestamp":"0:04","1":"Untitled 2 (2021 Paul Magrs webcast)"})

While living withPaul Magrs andJeremy,Panda stated that "one day, we'll be able to get together with all ourfriends again", including thetwats. (WC:Untitled 2^[+]Loading...["Untitled 2 (2021 Paul Magrs webcast)"])

Champion - LEVEL 1 was aZu-Zu-Poocard. (AUDIO:Maker's Wish: After Dark - Slalvok^[+]Loading...["Maker's Wish: After Dark - Slalvok (audio story)"])

TheFourteenth Doctor's firsttrip onhis favourite planet was duringthe Meep's attempted destruction of London. (PROSE:The Doctor's Busiest Day^[+]Loading...{"page":"8","1":"The Doctor's Busiest Day (short story)"})

In the language spoken by the crew of thecaptain'sspaceship that accidentally flew to theedge of the universe, the word for 1 was "Sensill". TheFourteenth Doctor, while not speaking the language was able to translate this number, and used that to read the ship's base code, data logs and control elements of the ship. (TV:Wild Blue Yonder^[+]Loading...["Wild Blue Yonder (TV story)"]) Seeing "Jimbo", the Doctor discovered that the ship may not have been asabandoned as it first seemed. (PROSE:The Doctor's Busiest Day^[+]Loading...{"page":"8","1":"The Doctor's Busiest Day (short story)"})

Ruby Sunday once recalledcelebrating atChristmas ata club, at which time thedancefloor was packed, with oneperson in themiddle of it all: theFifteenth Doctor. (PROSE:Who's the Doctor?^[+]Loading...{"page":"6","1":"Who's the Doctor? (short story)"})

Behind the scenes[[edit] |[edit source]]

ThoughAUDIO:The Haunting establishes that 1 is itself considered a prime number in theDWU, this is a point of contention among mathematicians. There was significant disagreement as to whether to classify 1 as a prime number in the story's time period of the1890s. In particular, the entry forNumber published in 1890 in the 9th edition ofEncyclopædia Britannica stated that every positive number was either prime or composite, and explicitly listed 1 as prime.^[1] Nowadays, in the 21st century, 1 is instead generally considered as neither prime nor composite. To further complicate real-world existence of 1 as a number, there have even been periods of time - like Ancient Greek era - where 1 was in factnot even considered a number.^[2] This included notable mathematicians like Aristotle and Euclid.^[3]

Though unremarked inPROSE:Daisy Chain, 1 is also the first and secondFibonacci number.

Footnotes[[edit] |[edit source]]