Boa noite,
não estou conseguindo identificar o motivo de não abrir este arquivo .txt corretamente, ele tem em torno de 6.3 GB
Alguém teria uma dica para compartilhar? Acredito que não estou trabalhando corretamente!

library(data.table)
readLines("DADOS_ENEM_2011.TXT", n = 1)

[1] "3000000000012011 2803548708SAO BERNARDO DO CAMPO                                                                                                                                 SP110000000000000000000011       .      .                                                                                                                                                        ...3548708SAO BERNARDO DO CAMPO                                                                                                                                 SP1111   577.10   576.00   575.50   737.10CEBDCACBEAABBAABAEBDCABDCDEAAADCBBEBADDBEBECDDEECABABEBDDEBAEADCACABCBBECADDAADBADDAABABCAEEAEAEDDDAAEEBDECADCEABDDBAECAAABDAEBCCACBAECBAEBECCAAEBABECECCDDAACDADADBACCBAADCAECCCEDD1241201251290CECDDACBCAEBEBBACEEDCAEBDAEDADBEBBDDADCBCBACDDEECEBABAADDEBAECDCACEDCBBEBCDCAADBADDDBAEACAEEDBDBDDCAEDDDACDEBBECAACDABADBAECCEADDCEBCBACBAEEBAEEECCEEEBCBECEBADCBDBEADCDBDCCCBADCAECCCCDDP   140.00   140.00   140.00   140.00    60.00   620.000 .       .      .                                                                                       

require(bit64)
enem2011<- fread("DADOS_ENEM_2011.TXT", nrow = 1, header = TRUE, sep=";")
head(enem2011)

3000000000012011 2803548708SAO BERNARDO DO CAMPO                                                                                                                                 SP110000000000000000000011       .      .                                                                                                                                                        ...3548708SAO BERNARDO DO CAMPO                                                                                                                                 SP1111   577.10   576.00   575.50   737.10CEBDCACBEAABBAABAEBDCABDCDEAAADCBBEBADDBEBECDDEECABABEBDDEBAEADCACABCBBECADDAADBADDAABABCAEEAEAEDDDAAEEBDECADCEABDDBAECAAABDAEBCCACBAECBAEBECCAAEBABECECCDDAACDADADBACCBAADCAECCCEDD1241201251290CECDDACBCAEBEBBACEEDCAEBDAEDADBEBBDDADCBCBACDDEECEBABAADDEBAECDCACEDCBBEBCDCAADBADDDBAEACAEEDBDBDDCAEDDDACDEBBECAACDABADBAECCEADDCEBCBACBAEEBAEEECCEEEBCBECEBADCBDBEADCDBDCCCBADCAECCCCDDP   140.00   140.00   140.00   140.00    60.00   620.000 .       .      .                                                                                                                                                        ...
1: 3000000000022011 2214125506SAO JOSE DOS PINHAIS                                                                                                                                  PR110000000000000000000011       .      .                                                                                                                                                        ...4125506SAO JOSE DOS PINHAIS                                                                                                                                  PR0000      .        .        .        .                                                                                                                                                                                      1211171251290DCEACDBECBCAEBACBEAECEDEDAABDBEDBBDDDCABCBDCAEDEBCEAEDBDAACACECDBBCACEDCDCBAEADADBBDDEAABAEEDBDBDDCAEDDDACDEBBECAACDABADBAECCEADDCEBCBACBAEEBAEEECCEEEBCBECEBADCBDBEADCDBDCCCBADCAECCCCDDF     0.00     0.00     0.00     0.00     0.00     0.000 .       .      .                                               
 
obrigado.


André Oliveira Souza. Graduação em Matemática, mestrado em estatística aplicada.Instituto Federal de Educação, Ciência e Tecnologia do Espirito Santo.  IFES