Despite Carter's best intentions, the calculations from his tweet were slightly wayward.
The 35-year-old suggested that if the All Blacks were to win the 2023 World Cup, it would be their third consecutive title after winning the 2011 and 2015 campaigns.
However, the 112-cap first-five seemed to have bypassed the 2019 World Cup in Japan, which if the All Blacks were to win would make it their third straight title.
World Cup glory for the All Blacks in 2023 would mean either they would be crowned world champions for the fourth straight tournament, or that they would have won the event for the first time since 2015.
Carter's tweet was met with some light-hearted banter from his followers, with many Irish fans poking fun at the two-time world champion for not backing Ireland's bid.
The hosts for the 2023 event will be announced on 15 November.